570.This section provides that the rules in sections 290 and 291 shall apply (with modifications) where an officer makes an order activating a suspended sentence of service detention under section 193. Unless the officer orders that the suspended sentence is to take effect from the end of another sentence, the rules in section 290 apply; if the order does provide that the suspended sentence is to take effect from the end of another sentence, then the rules in section 291 apply.