30. In Article 49 of the principal Order (revision of valuation list, and alteration, by district valuer), after paragraph (5) there shall be added the following paragraph—
“(6) If the district valuer decides that an application served on him is frivolous or vexatious—
(a)he shall serve on the applicant notice of his decision; and
(b)sub-paragraphs (a) and (b) of paragraph (1) shall not have effect in relation to that application.”.