The receiving employer may discover the problem after payroll has transferred, a service contract has commenced and sponsored employees have continued working. By that point, the commercial transaction may look settled while the sponsor position remains unresolved.
The operative deadline under paragraph C4.22 is not simply an administrative target. If the receiving organisation required a licence and failed to make a valid application within the specified period, the consequences must be analysed across the licence, each worker's permission and the employer's right to work controls.