In Schedule 20 to that Act (supplemental provisions with respect to powers of entry) in paragraph 7 (which creates an offence of obstruction, punishable on summary conviction by a fine not exceeding level 3) for the words from “liable, on summary conviction,” onwards there shall be substituted the words“liable—

(a)

on summary conviction, to a fine not exceeding the statutory maximum;

(b)

on conviction on indictment, to a fine or to imprisonment for a term not exceeding two years, or to both.”