Simples
EFP applies to the Net Take-off Flight Path which ends at 1500' agl. It is usually employed to manoeuvre around an obstacle within the Net Take-off Flight Path that would otherwise limit the mass at which you can take off. Having an EFP (sometimes known as an Emergency Turn) allows the performance limited take-off mass to be increased. EFP's are promulgated by (or on behalf of) the aircraft operator.
If it is expected that obstacle clearance throughout the whole of the SID will not be maintained in the event of an engine failure, the Airport Authority may publish an alternative SID that will ensure obstacle clearance is maintained.