As you asking for the UPSC CISF AC Examination Application form let me tell you that at present the Application form for the UPSC CISF AC Examination is Not Available
Here I am giving you the procedure by which you may get the UPSC CISF AC Examination Form When it is Available

go to the official site of the UPSC

the page may look as follow



There at the Mid of the page you may get the Link for the Application form of the Examination click on it It may redirect to the page from there you may get the Application form of the UPSC CISF AC Examination.