3.—(1) This paragraph applies in relation to an installation operated by a person acting on behalf of—
(a)the Royal Household;
(b)the Duchy of Lancaster; or
(c)the Duke of Cornwall or other possessor of the Duchy of Cornwall.
(2) In relation to the serving or giving of notices or other documents under these Regulations, the following person must be treated as the operator—
(a)in relation to sub-paragraph (1)(a), the Keeper of the Privy Purse;
(b)in relation to sub-paragraph (1)(b), the person appointed by the Chancellor of the Duchy of Lancaster;
(c)in relation to sub-paragraph (1)(c), the person appointed by the Duke of Cornwall or other possessor of the Duchy of Cornwall.