N.Y.C. Admin. Code § 28-502.4.2: § 28-502.4.2 Other required information.

Such list shall also indicate the work permit identification numbers for the erection, alteration or installation of such signs pursuant to chapter 1 of this title and for the maintenance of such signs pursuant to article 501, unless a permit is not required pursuant to such provisions, as well as the name and license number of the master or special sign hanger who hung or erected each such sign.