If I can jump in...as a tower controller (and hence one that struggles with combined delivery and ground at 12:34 in the morning), we will give you the normal SID that has long been in use, i.e. "CX 253, cleared (to destination) via BEKOL, flight plan route, ATENA 1A (for 07R) Departure, Squawk code ----" If you want the new RNAV departure, then you would request on 129.9 (or 122.55) that you want the ATENA 1E, and it shall then be given in the format "CX 253 you are now cleared via the ATENA 1E SID, everything else remains the same". No queries are made on behalf of ATC as to whether or not you are going to do it upside down, backwards etc. Meanwhile another 10 aeroplanes jump in squealing the frequency....see you in a few nights!!!