TL_BLEEVT_CS_OPCODE vs TL_BLEEVT_CC_OPCODE

[DS.4]

Example: BLEHeartRateFreeRtos.

In one case of command response we get TL_BLEEVT_CS_OPCODE , another one is TL_BLEEVT_CC_OPCODE.

What is the difference?

Can we get more than one packet of response in each case? (It looks like the code is written to handle this case)

Why in TL_BLEEVT_CC_OPCODE only saves (memcopy) the last packet received ?

while(local_cmd_status == HCI_TL_CmdBusy)
 {
 hci_cmd_resp_wait(HCI_TL_DEFAULT_TIMEOUT);
 
 /**
 * Process Cmd Event
 */
 while(LST_is_empty(&HciCmdEventQueue) == FALSE)
 {
 LST_remove_head (&HciCmdEventQueue, (tListNode **)&pevtpacket);
 
 if(pevtpacket->evtserial.evt.evtcode == TL_BLEEVT_CS_OPCODE)
 {
 pcommand_status_event = (TL_CsEvt_t*)pevtpacket->evtserial.evt.payload;
 if(pcommand_status_event->cmdcode == opcode)
 {
 *(uint8_t *)(p_cmd->rparam) = pcommand_status_event->status;
 }
 
 if(pcommand_status_event->numcmd != 0)
 {
 local_cmd_status = HCI_TL_CmdAvailable;
 }
 }
 else // my comment: if( TL_BLEEVT_CC_OPCODE)
 {
 pcommand_complete_event = (TL_CcEvt_t*)pevtpacket->evtserial.evt.payload;
 
 if(pcommand_complete_event->cmdcode == opcode)
 {
 hci_cmd_complete_return_parameters_length = pevtpacket->evtserial.evt.plen - TL_EVT_HDR_SIZE;
 p_cmd->rlen = MIN(hci_cmd_complete_return_parameters_length, p_cmd->rlen);
 memcpy(p_cmd->rparam, pcommand_complete_event->payload, p_cmd->rlen);
 }
 
 if(pcommand_complete_event->numcmd != 0)
 {
 local_cmd_status = HCI_TL_CmdAvailable;
 }
 }
 }
 }

Could not find the relevant documentation.