My main tips for entry requirements:

(1) Have entrants submit their entries via a direct comment on the entry chapter (as opposed to via PM/DM or some other method). This will lead indirectly to an increased view count, and every view will help your contest. It will also allow you to do the following...

(2) Definitely require entrants to tag other users as part of their entry forms. This is the second-best way to get the word of your contest to spread.  (For the very best, read the earlier chapter about "the secret weapon.")

-Do not be lax about enforcing this. That is not fair to the other entrants who fulfilled all the requirements. So long as someone has as many followers as you require tags, it is the impartial thing to do to not accept their entry until they have adhered to the rules like everyone else.

-In terms of how many user tags to require, I have seen anywhere from 1 to 12. I feel that 1 or 2 is too few. I have seen a few successful contests that required 3, but most needed 5. The ones I've seen with more than 6 tended not to do as well.

(3) Ask your entrants to place your contest in a public reading list of theirs (not just their private library). Though not incredibly effective, this is one way to increase visibility of your awards, and every little bit counts.

(4) If you accept mature works, definitely ask your entrants to specify if their work includes that sort of material. The reasons for this are two-fold:

-People under the age of 18 should not be asked to read mature works so as to judge them. If an underage person chooses to read that type of material on their own time, that is their prerogative. However, as the administrator, it behooves you to act responsibly.

-People who are uncomfortable reading mature works should not be asked to read/judge them, regardless of their age.

-Thus, you can assign the appropriate works to any judges that are participating.  The odds of being able to recruit enough judges for an entire contest without any of them being minors are very slim for anything but the smallest contests and most dedicated of judges.

(5) Do specify the total number of works an author may enter in the contest as a whole, the number that an author can enter in a given category/genre, and whether these limitations are with regards to each individual account of an author, or to all of their accounts combined. It might not hurt to have a policy in mind for co-authored works too, though that doesn't seem to come up too frequently. Things to specify:

(a) How many entries can one author enter in a given category?

(b) May an author submit entries from more than one account (if they have multiple accounts)? Are the limitations on submissions applied to each account separately, or together?

(c) How many entries can be entered into the contest as a whole? How many genres can be entered?

-For example, let's say I have three accounts. #1 has two horror books. #2 has one horror, one romance. #3 has one horror, one poetry.

-Can every single one be entered in the contest (6 works total, 3 genres, across 3 accounts)?

-Or only one per genre, applied to each account individually, but no limit to number of genres? (Thus, #1 would have to pick, but all the other works could be entered.)

-Or one per genre, for every account of an author, but no limit to number of genres entered? (Thus, only one horror book could be entered between the three, but the romance and poetry could both be entered.)

-Or, one entry total, in any category, per author (only one of the six works could be entered)?

(6) Though it is silly and irritating when people ask for entrants to follow a large number of accounts as a requirement for entry, it is reasonable to ask them to follow a small number of judges, for the category(ies) they are entering, for the duration of the contest (not permanently). Convincing people to judge contests can be difficult, and follows from the people they are judging is something that some people are really into.

(7) It's not a bad idea to have entrants specify if their work has any 'private' chapters.

-These chapters will not be readable to any user not following the entrant, and are generally private because of excessive expletive use, or because someone brought it to the attention of Wattpad staff for being exceptionally racy.

-Since you should not require any judges to follow entrants, it follows that judges will not be able to read any private chapters in an entry.

-Let entrants know that private chapters will not be read, and will be excluded from judging. If that makes the story disjointed, it may cause the assessment of the work to be less favorable.

(8) Make sure the entrants know they have to tell you if they change either their username or the title of their work. It's nice if you have the energy to give them a chance to fix it before removing them from the contest, but not necessary.

-Hint: Ask for the 'Author' as part of the entry form.  This may seem redundant if you only allow users to enter their own works, but there is a reason for doing it.  That way, when you are scrolling through the comments to check to see if you missed anything, you will easily be able to see who changed their username, as the author listed and the poster's name will not longer match.  (Note that it won't work out that way if people are allowed to nominate the works of other users.)