No owner or agent of the owner of any land located within a subdivision shall transfer, sell, agree to sell or negotiate to sell any land by reference to, by exhibition of or by the use of a plan or plat of a subdivision before such plan or plat has been approved and forwarded in the manner prescribed in these Subdivision Regulations. Any sale or transfer contrary to the provisions of this section is voidable at the option of the buyer. The description of such lot or parcel by metes and bounds in the instrument of transfer or other document used in the process of selling or transferring shall not exempt the transaction from the provisions of these Regulations.