27. Any person who, without reasonable excuse—
(a)obstructs another person acting under the authority of the promoter in setting out the lines of the scheduled works, or in constructing any of the authorised works; or
(b)interferes with, moves or removes any apparatus belonging to any person acting under the authority of the promoter,
shall be guilty of an offence and liable on summary conviction to a fine not exceeding level 3 on the standard scale.