Very simple, CDL (config deviation list) has a default time limit of 120 DAYS, unless otherwise stated in another reference (AMM, SRM, tech note, ...). You as engineer can deviate from the default 120d by saying for example "to be carried out next A-check" or "next hangar input" or something like that, where in the MEL, you cannot deviate from the time limit. Be aware for the time limits in the AMM, many people forget these.
It can be that the default value differs from company to company, but this can be found in the CAME or MOE, check your quality dept.