There is really nothing "clear and simple" about Regulation CC holds. It's a complex topic, since the rules vary depending on the type of check (next-day checks v. all others; large check deposits; on-us checks; U.S. Treasury checks, redeposited checks, etc.), aspects of your depositor's account history (recurring overdraft holds) and your banks' own policies.
There is a helpful chart in BankersOnline's Tools that explains how you can handle various types of checks if your bank maximizes the delays in availability to those permitted in the regulation (using current dollar amounts). Here's a link:
You'll see "Member" used in the chart in place of "Customer" because the chart was developed for a credit union.