Historical Rules · 7 February 2025
Rule 123.3c
Official source text from the 7 February 2025 Rules release
A sticker may have a ticket cost represented by a number inside a ticket symbol (see rule 107.17a). In order to put a sticker with a ticket cost on an object, the player who owns that object must pay that much {TK}. If they don’t have that much {TK}, they can’t put that sticker on an object.