The Nat'l park pass has been age 62 since at least 2008 and I believe quite a few years before that (friends were volunteers at several Nat'l parks in the states). We went to Cruz Bay on 5/28/08 to check in and get Gene's Park Pass. His 62nd birthday was 5/29/08 and the park rangers told us on the 28th to come back the next day when he turned 62 to get the pass. After getting the pass we spent a lot of time in the anchorages of St John.