Byelaws made by a local authority, and for which specific provision is not otherwise made, may provide that persons contravening the byelaws shall be liable on summary conviction to a fine not exceeding such sum as may be fixed by the enactment conferring the power to make the byelaws, or, if no sum is so fixed, the sum of F1level 2 on the standard scale, and in the case of a continuing offence a further fine not exceeding such sum as may be fixed as aforesaid, or, if no sum is so fixed, the sum of £5 for each day during which the offence continues after conviction thereof.