Section 327. Certification of legal authority and procedural requisites

a.
  In the case of any contract which  is  let  by  other  than  competitive
  sealed  bidding,  the  mayor  shall  certify, prior to the filing of the
  contract with  the  comptroller  for  registration  in  accordance  with
  section  three hundred twenty-eight of this chapter, that the procedural
  requisites for the solicitation and award of the contract have been met.
  The mayor may delegate such function to the agency proposing to award  a
  contract  only upon adequate assurance of an agency's capacity to comply
  with procedural requirements.
    b. The corporation counsel shall certify prior  to  the  filing  of  a
  contract  with  the  comptroller  for  registration  in  accordance with
  section three hundred twenty-eight of this  chapter,  that  each  agency
  proposing  to  award  a  contract has legal authority to award each such
  contract.