just checked and yes it is 24 hours but it is important to remember the burden is on the casino not the player. the whole ctr deal was the result of the treasuary dept putting pressure on casinos to comply with bank secrecy act.
structuring deposits in a bank can be considered money laudering but i am not familiar with anyone ever being charged with structuring chips.
btw, the ctr is used when one transaction exceeds $10,000. in a cases where multiple transactions exceed $10,000 the casino is supposed to use the mtr. as a general rule, a transaction must exceed $2,500 to be entered into a mtr.
don't forget if you are cashing large amounts of chips, some casinos will you push you for personal info in attempt to determine if you have a marker down.
as for other casinos, there is no relevance with this. each casino is a seperate deal. although it does bring up an interesting point because it is sometimes possible to cash chips for one casino at another casino. for example, mirage chips at mgm (same owners) but if you have large amounts they will push you for info.