265 C.M.R. 7.01
(4) The definition of “gross incompetence” contained in M.G.L. c. 112, § 199(5) shall include, but not be limited to, failure of the registrant to advise a prospective hearing instrument user prior to fitting and dispensing a hearing instrument that the user should first consult a licensed physician specializing in diseases of the ear whenever any serious conditions are found or should have been found to exist, either as a result of observations of the registrant or from information furnished by such prospective hearing instrument user, including, but not limited to, the following conditions: