Sources connected with both Amber and Wiz tell TMZ ... Amber made numerous demands in the prenup ... which is more than 8 pages long.
Cheating is IRRELEVANT ... California is a no-fault state and there's no mention of infidelity in the document.
Likewise ... the prenup does not mention custody, and for good reason -- the judge always makes that decision, based on the best interests of the child. Amber is asking for full legal and physical custody.
There are 2 additional pages to the prenup ... and in them Wiz agrees to pay Amber spousal support in addition to the one-time payout. We're told the support is "modest" -- slightly more than $5K a month.