An employee shall not be entitled to recover for medical services and supplies unless:

(a) The employer shall have refused or neglected a request to furnish such services and the employee has complied with sections 7 (b) and (c) of the Act, 33 U.S.C. 907 (b) and (c) and these regulations; or

(b) The nature of the injury required such treatment and services and the employer or his superintendent or foreman having knowledge of such injury shall have neglected to provide or authorize same.