Inland Parcels irregularly posted

If any postal packet apparently intended for transmission as an inland parcel is posted otherwise than in accordance with regulation 63 of these Regulations, the Postmaster General shall– (a) if the parcel is fully prepaid at the appropriate rate and is admissible by such post, forward the parcel as a letter, printed paper or newspaper; or (b) if the parcel is insufficiently prepaid at the rate applicable to letters, printed papers or newspapers, but is otherwise admissible by any such post, forward the parcel to the addressee, who shall pay the Postmaster General a sum equal to double the deficiency at the appropriate rate or to the deficient postage at the parcel post rate together with a 57 further sum of five cents whichever is the less; or (c) if the parcel is inadmissible by such post, it shall be dealt with in accordance with the provisions of 68 of these Regulations subject nevertheless (if the parcel is returned to the sender) to a charge equal to double the amount of any deficient postage at the lowest appropriate rate.