From LASORS 2005:
"The holder of a PPL(A) issued in accordance with ICAO
Annex 1, with at least 150 hours flight time as a pilot,
may commence an approved JAR CPL(A) Modular
Course consisting of 25 hours dual flight instruction
including 10 hours of instrument instruction (up to 5
hours may be instrument ground time in a FNPT I or II
or a flight simulator). At least 5 hours of the flight
instruction shall be carried out in a complex aeroplane
(certificated for the carriage of at least four persons and
have a variable pitch propeller and retractable landing
gear)."
That's to start a modular CPL course. But by the time you finish and apply for the licence itself, you must have achieved (amongst other things) at least 100 hours as Pilot-in-Command.