And Joe the Plumber doesn not need a license to work as a plumber for somebody else in the state of Ohio. Please find below the section of the code that applys:


CHAPTER 4740: CONSTRUCTION INDUSTRY LICENSING BOARD
4740.01 Construction industry licensing board definitions.
As used in this chapter:

(A) "License" means a license the Ohio construction industry licensing board issues to an individual as a heating, ventilating, and air conditioning contractor, refrigeration contractor, electrical contractor, plumbing contractor, or hydronics contractor.

(B) "Contractor" means any individual or business entity that satisfies both of the following:

(1) For compensation, directs, supervises, or has responsibility for the means, method, and manner of construction, improvement, renovation, repair, or maintenance on a construction project with respect to one or more trades and who offers, identifies, advertises, or otherwise holds out or represents that the individual or business entity is permitted or qualified to perform, direct, supervise, or have responsibility for the means, method, and manner of construction, improvement, renovation, repair, or maintenance with respect to one or more trades on a construction project;

(2) Performs or employs tradespersons who perform construction, improvement, renovation, repair, or maintenance on a construction project with respect to the contractor's trades.

(C) "Licensed trade" means a trade performed by a heating, ventilating, and air conditioning contractor, a refrigeration contractor, an electrical contractor, a plumbing contractor, or a hydronics contractor.