(a) No person, corporation, partnership, firm or other business association acting in the capacity of a contractor shall work at the trade or occupation of building, constructing, altering, repairing, painting, moving or demolishing any building, sign or other structure or do any plaster work, mason work, brick laying, roofing work, paving, or street or sidewalk construction or repair unless such person, corporation, partnership, firm or other business association has been duly registered as a contractor by the Division of Building and Zoning Inspection.
(b) "Contractor", for the purpose of this section, means any person, corporation, partnership, firm or other business association who performs any work specified above for consideration evidenced by an oral or written agreement. "Contractor", for purposes of this section shall also mean any person, firm, corporation or other business association which negotiates a contract either written or oral for any work specified above, but does not perform physical labor to complete the work as set forth in the contract. No corporation, partnership, firm or other business association shall engage in work for which a certificate of registration is required, unless at least one responsible member, officer or employee of such corporation, partnership, firm or other business association has been registered pursuant to this chapter. All work performed by such corporation, partnership, firm or other business association shall be under the direct supervision of the registered person.
(c) A person, corporation, firm or other business association acting in the capacity of a contractor and performing more than one type of work as set forth in subsection (a) hereof, shall only be required to register once annually as a contractor regardless of the number and types of work performed.