In this Chapter “prisoner custody officer” means a person in respect of whom a certificate is for the time being in force certifying—
that he has been approved by the Scottish Ministers for the purpose of performing escort functions or custodial duties or both; and
that he is accordingly authorised to perform them.
Schedule 6 to this Act shall have effect with respect to the certification of prisoner custody officers.
Prison rules may make provision regarding the powers and duties of prisoner custody officers performing custodial duties.