In this Act, unless the context otherwise requires,-

(10). "contractual transfer price" in relation to any period, means the aggregate of the amount received or receivable by a dealer in respect of transfer of property in goods (whether as goods or in some other form) in execution of any works contract, as defined in clause (57), whether executed fully or partly during such period.

Explanation.–For the purpose of this clause, the expression "partly during such period" means the year or part of the year for which assessment is made whether or not any tax invoice, invoice or bill has been raised in respect of such contract;