For which type of promotion must participants act according to the specific rules and may or may not be required to submit proofs of purchase?

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Contests require participants to engage in some form of activity or competition, often necessitating adherence to specific rules set by the promoter. Unlike sweepstakes, which are generally based on chance, contests may require skill, creativity, or other forms of effort from participants. Proofs of purchase may or may not be a part of the entry requirements, depending on the specific rules of the contest.

For Which Type of Promotion Must Participants Act According to the Specific