(1) If a person has committed more than one offence sections 53 to 55 shall apply mutatis mutandis to the calculation of the sentence to be deferred.

(2) If the convicted person is subsequently sentenced to a fine or term of imprisonment for an offence committed before the warning was given, the provisions for fixing an aggregate sentence (Sections 53 to 55, section 58) shall apply, the deferred sentence shall, for the purposes of section 55, be equal to an immediate sentence.