Conditional requisites are SYSMODs required only for a particular functional environment. All conditional requisites of each SYSMOD must be resolved. Conditional requisites are specified on the ++IF statement immediately following the applicable ++VER statement. If the function specified in the FMID operand of the ++IF statement is applied or is being applied, each SYSMOD specified in the ++IF statement REQ operand must be satisfied. These requisites are satisfied in the same manner as unconditional requisites.

If the function specified in the FMID operand of the ++IF statement is not already installed, in order to make sure these requisites are satisfied when the function is installed, SMP/E saves the information from the ++IF statement as CIFREQ subentries in the target zone SYSMOD entry for that function. When the function is applied, SMP/E checks the CIFREQ subentries for requisites supplied by previously applied SYSMODs and makes sure these requisites are satisfied.