For each normal individual activity (such as Hunting and Scavenging), you may post up to 7 activities per week (each featuring up to three dergons); Functionally, this amounts to one per day, but allows for multiple posts at once, such as submitting art and literature rolls in the same post at the same time.
Other activities have more specific limits for different time frames; for example, Nursery adoptions are one every two months, and Vault requests have no limits.
AI-generated content is not allowed and cannot be redeemed for game rewards, whether used in the subject or the background, or in any writing. (If you're not making art in an Art RPG, you're playing the wrong game!)
Traced content cannot be redeemed for game rewards.
Photobashing may not be used solely as a background; referenced photobashes are allowed, but must consist of photos licensed to be editable (such as those on Wikimedia Commons) and should be used as a basis for original art, and not a main component of the final submission.
Reused content (such as a multislot YCH) can be redeemed once per reused asset! E.g. Lines can be redeemed once and a background can be redeemed once, but reusing either would make it ineligible for future works. An exception to this is physical media such as a sculpture, but this must show distinct change in the surrounding background to be reused.
Gore and suggestive works are allowed but must be properly warned for. (If you feel really strongly about dergons boinking, NSFW is allowed for general art/EXP but not activity or event submissions, and must be properly warned for and not posted in the public server.)
For activity submissions, the requirements are:
Images or writing are uploaded on some form of gallery site (Such as deviantArt, ArtStation, Furaffinity, Archive Of Our Own (especially for writing), or toyhou.se) and are visible without logging in
Images or writing can be linked to and viewed from that link (thus, discord images will not work, as links to discord images time out after several hours) (For PG-13 gore or suggestive content, a link to a direct image accompanied by a link to the original post is acceptable!)
Images or writing are directly credited to the original artist, either through their original upload, or a link in the upload's description directing to the artist's page, and follow the original artist's rules regarding the reuploading of their work