6. For the purposes of these Regulations, works or a building as regards which a material change of use takes place in respect of the following, are exempted from the Regulations—

( a)  F9 [ … ]

( b) works is connection with—

(i) a Garda station or other building used for the purposes of or in connection with the operations of An Garda Siochana,

(ii) a courthouse,

(iii) a barrack or other building used for the purposes of or in connection with the operations of the Defence forces,

(iv) an office or other building used for the purposes of or in connection with the business of Uachtaran na Éireann, Dail Éireann, Seanad Éireann, the Department of the Taoiseach, the Office of the Tánaiste, the Department of Defence, the Department of Foreign Affairs, the Department of Justice, Equality and Law Reform, the Office of the Attorney General, the Chief State Solicitor’s Office and the Office of the Director of Public Prosecutions,

provided that after the works the building is or continues to be a building referred to in sub-paragraphs (i) to (iv).

( c) works, or a building as regards which a material change of use takes place, where the works are carried out or the material change of use is made, for reasons of national security—

(i) within, or bounding, the curtilage of any building (other than a building referred to in paragraph (b)), premises or other installation occupied by, or under the control of, a State authority,

(ii) by or on behalf of a State authority, within, or bounding, the curtilage of the residence of a holder, or former holder, of a public office or any other public servant or former public servant.

F10 [ ( d ) a building referred to in paragraph ( b ). ]