A Regulation 110 determination must be formally signed or
certified by a Higher Officer or above.
If you make a number of determinations during the year you
may choose to use a form P640(Cert) to authorise the charges.
If you use a P640(Cert) you must
Where you have decided to use form P640(Cert) to authorise
determinations you must continue using that method for the
remainder of that accounting year.
Where you do not use the P640(Cert) the Authorising officer
must sign each P640.