SPS is mostly implemented for Voice call But CA service is implemented for NGBR bearer offloading. So if eNB activates CA then it will offload default bearer to Scell (Most of the eNB implementation says). With all this restriction eNB will not activate the SPS in Scell
Specification doesn't restrict this, eNB free to offload any service to Scell..
But DRX can be activated in Scell,This should be in sync with Pcell, otherwise UE battery consumption will be more If all the serving cell Falls in different ON duration.