checkpoint rules version 29.03 2025-11-19
Add an `#ruleX` anchor tag to each rule. Fix `GNU Makefile syntax` in `Rule 15 Building`. Remove redundant text in `Rule 17 Packaging` about empty/blank files. Ran `make quick_www` to perform the above.
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@@ -30,7 +30,7 @@ app from time to time to view IOCCC mastodon updates.
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29th International Obfuscated C Code Contest Official Rules
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------------------------------------------------------------
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Copyright © 2024-2025 Leonid A. Broukhis and Landon Curt Noll.
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Copyright © 2025 Leonid A. Broukhis and Landon Curt Noll.
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All Rights Reserved. Permission for personal, education or non-profit use is
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granted provided this this copyright and notice are included in its entirety
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@@ -41,13 +41,15 @@ writing by [contacting the judges](../contact.html).
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Rules version
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-------------
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These IOCCC Rules are version **29.02 2025-11-19**.
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These IOCCC Rules are version **29.03 2025-11-19**.
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Be sure to read the [IOCCC guidelines](guidelines.html).
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<div id="rule0">
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Rule 0 Dates
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------------
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</div>
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This IOCCC runs from ${START_DATE_TIME} UTC to ${CLOSE_DATE_TIME} UTC.
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@@ -60,14 +62,18 @@ The above dates are subject to change until the contest is officially open.
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**NOTE**: As of this draft, the above dates are TBD (to be determined).
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<div id="rule1">
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Rule 1 Program
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---------------
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</div>
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Your submission **MUST** be a C program.
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<div id="rule2">
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Rule 2 Size
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-----------
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</div>
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`Rule 2` requires that your submission satisfy **BOTH**
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[Rule 2a Gross Size](rules.html#rule-2a-gross-size)
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@@ -77,13 +83,17 @@ During development this can be checked using `iocccsize(1)`:
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iocccsize prog.c
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<div id="rule2a">
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### Rule 2a Gross Size
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</div>
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The overall maximum size of your `prog.c` program source **MUST NOT**
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exceed **4993** bytes.
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<div id="rule2b">
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### Rule 2b Net Size
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</div>
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When the filename of your program source (i.e., `prog.c`) is given as a
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command line argument to the latest version of the official IOCCC size
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@@ -91,8 +101,10 @@ tool (hereby referred to as `iocccsize(1)`), the value printed **MUST
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NOT** exceed **2503**.
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<div id="rule3">
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Rule 3 Register
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---------------
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</div>
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You **MUST** register, using a valid email address, in order to submit
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entries to the IOCCC. You may register while the contest is **pending** or **open**.
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@@ -113,8 +125,10 @@ See [Entering the IOCCC: the bare minimum you need to know](../quick-start.html#
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See [Rule 8 Submission](rules.html#rule-8-submission).
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<div id="rule4">
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Rule 4 Files
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------------
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</div>
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The submission **MUST** include at least these files: `Makefile`, `prog.c`,
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`remarks.md`,`.info.json`, and `.auth.json`. The last two **MUST** be
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@@ -166,8 +180,10 @@ See [IOCCC markdown guidelines](../markdown.html).
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See [Rule 17 Packaging](rules.html#rule-17-packaging).
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<div id="rule5">
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Rule 5 Purity
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-------------
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</div>
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Your submission **MUST NOT** modify the filenames or content of any of
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your original submission, such as `prog.c`, `Makefile`, or any supplied
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@@ -188,8 +204,10 @@ Your code should be able to run under a
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[SUS environment](https://pubs.opengroup.org/onlinepubs/9799919799/).
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<div id="rule6">
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Rule 6 Free
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-----------
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</div>
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I am **NOT** a Rule, I am a `free(void *human);` ‼️
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@@ -202,8 +220,10 @@ I am **NOT** a Rule, I am a `free(void *human);` ‼️
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See [Rule 19 Prime](rules.html#rule-19-prime).
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<div id="rule7">
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Rule 7 Original Work
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--------------------
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</div>
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In short: You wrote it, you own it, and its an original work.
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@@ -226,8 +246,10 @@ describe what tools and how you used those tools, in your `remarks.md` file.
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See [Rule 16 Anonymous](rules.html#rule-16-anonymous).
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<div id="rule8">
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Rule 8 Submission
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-----------------
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</div>
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The Submit Server will only accept submissions from those who have
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registered and only while the contest is open.
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@@ -247,8 +269,10 @@ and
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[Rule 17 Packaging](rules.html#rule-17-packaging).
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<div id="rule9">
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Rule 9 No hands
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----------------
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</div>
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Entries requiring human interaction to be initially compiled are **NOT**
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permitted. However, see the guidelines. Each entry **MUST** automated the
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@@ -260,8 +284,10 @@ Note references to `gmake` can be any GNU Make compatible tool.
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See [Rule 15 Building](rules.html#rule-15-building).
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<div id="rule10">
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Rule 10 Privileges
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------------------
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</div>
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Programs that require special privileges (setuid(2), setgid(2),
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super-user, special owner, special group, etc.) are **HIGHLY DISCOURAGED**.
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@@ -280,8 +306,10 @@ and
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[Rule 5 Purity](rules.html#rule-5-purity).
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<div id="rule11">
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Rule 11 Abuse
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-------------
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</div>
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Legal abuse of the rules is somewhat encouraged, but comes with risks.
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A submission that, in the opinion of the Judges, violates the rules **WILL
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@@ -305,14 +333,19 @@ abusing version so that the Judges don't think you uploaded a duplicate
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into a wrong slot by mistake.
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<div id="rule12">
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Rule 12 UTF-8
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-------------
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</div>
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Use of UTF-8 is supported by `C89` standard and its updates and so too by the IOCCC.
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<div id="rule13">
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Rule 13 Newlines
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----------------
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</div>
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Any C source that fails to compile because lines contain carriage-returns
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(CTRL+M, `\r`) in particular as part of DOS/Windows style newlines might
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be rejected. Please do **NOT** put trailing CTRL+M in `prog.c`, `Makefile`,
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@@ -328,8 +361,10 @@ your compiler complains about this, document this too and update your
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`Makefile` to account for this.
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<div id="rule14">
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Rule 14 Resubmit
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----------------
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</div>
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Submissions that are substantially similar to previous winning IOCCC
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entries are discouraged.
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@@ -341,11 +376,13 @@ didn't previously win, then you are encouraged to mention this in your
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`remarks.md` file as this sometimes helps.
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<div id="rule15">
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Rule 15 Building
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----------------
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</div>
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The `Makefile` **MUST** adhere to GNU Make file syntax. Its recommended
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that you copy and rename the `Makefile.example` as a template. The primary
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The `Makefile` **MUST** adhere to GNU Makefile syntax. Its recommended
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that you copy and rename the `Makefile.example` as template. The primary
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target of the `Makefile` **MUST** be `prog` and the source file is `prog.c`.
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The C compiler and preprocessor **MUST** be invoked using `${CC}` and `${CPP}`
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macros respectively.
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@@ -374,8 +411,10 @@ Do **NOT** assume that `.` (current directory) is in the `$PATH` environment var
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See [Rule 4 Files](rules.html#rule-4-files).
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<div id="rule16">
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Rule 16 Anonymous
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-----------------
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</div>
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Your source code, data files, remarks, and program output **MUST NOT**
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identify the author(s) of your code (unless you are **Peter Honeyman**
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@@ -387,8 +426,10 @@ accident anywhere in your submission. ***Failure to comply may result
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in the submission being disqualified.***
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<div id="rule17">
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Rule 17 Packaging
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-----------------
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</div>
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The files, directories, and paths **MUST** conform to the limits imposed by
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`mkiocccentry(1)`, including but **NOT** limited, to their names, count, path
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@@ -413,8 +454,9 @@ The unpacked submission directory **MUST** pass the checks performed by the
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current version of `chksubmit(1)`.
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The `prog.c` file **MUST** pass the [Rule 2 Size](rules.html#rule-2-size)
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size checks performed by `iocccsize(1)`. The `Makefile` and `remarks.md` files cannot
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be empty nor blank. The `.auth.json` and `.info.json` files **MUST** be compatible with what
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size checks performed by `iocccsize(1)`.
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The `.auth.json` and `.info.json` files **MUST** be compatible with what
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`mkiocccentry(1)` generates.
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Submissions that package using older versions of the mkiocccentry
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@@ -429,8 +471,10 @@ rather than roll-it-by-hand.
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See [Rule 4 Files](rules.html#rule-4-files).
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<div id="rule18">
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Rule 18 License
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---------------
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</div>
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The entirety of your submission **MUST** be submitted under the following license:
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@@ -439,8 +483,10 @@ The entirety of your submission **MUST** be submitted under the following licens
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See [Rule 7 Original Work](rules.html#rule-7-original-work).
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<div id="rule19">
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Rule 19 Prime
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-------------
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</div>
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This 19th rule, while prime, is reserved for future abuse 😁.
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Additional rules, both humorous and otherwise, may be added
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@@ -462,5 +508,5 @@ server for discussions about The Rules, questions for the Judges, and
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`C` in general.
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Leonid A. Broukhis
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Leonid A. Broukhis
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chongo (Landon Curt Noll) /\\cc/\\
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