(1)  A single authority or joint authority is a body corporate with perpetual succession and a common seal.

(2)  The common seal is to be kept and used as authorised by the rules of the single authority or joint authority.

(3)  The execution of a document sealed by a single authority or joint authority is to be attested in accordance with the rules of the authority.

(4)  All courts and persons acting judicially must take judicial notice of the common seal on a document and presume that it was duly sealed.