211.Section 73, by means of new provisions to be inserted in section 17 of RSA 93, provides a mechanism for an authorised person to apply for a variation to the authorisation, while sustaining the existing position that, in relation to the revocation or variation of authorisations, the authorising authority can exercise its powers without such an application. The new provisions also set out the charges that must accompany any application that is made. They apply to all authorisations granted under sections 13 and 14 of the RSA 93, whether for nuclear sites or for other premises.