Md. Code, Labor and Employment § 3-415

(a) Except as otherwise provided in this section, each employer shall pay an overtime wage of at least 1.5 times the usual hourly wage, computed in accordance with § 3–420 of this subtitle.

(b) This section does not apply to an employer that is:

(1) subject to 49 U.S.C. § 10501;

(2) a nonprofit concert promoter, legitimate theater, music festival, music pavilion, or theatrical show; or

(3) an amusement or recreational establishment, including a swimming pool, if the establishment:

(i) operates for no more than 7 months in a calendar year; or

(ii) for any 6 months during the preceding calendar year, has average receipts that do not exceed one–third of the average receipts for the other 6 months.

(c) This section does not apply to an employer with respect to:

(1) an employee for whom the United States Secretary of Transportation may set qualifications and maximum hours of service under 49 U.S.C. § 31502;

(2) a mechanic, partsperson, or salesperson who primarily sells or services automobiles, farm equipment, trailers, or trucks, if the employer is engaged primarily in selling those vehicles to ultimate buyers and is not a manufacturer;

(3) a driver if the employer is engaged in the business of operating taxicabs; or

(4) unless a collective bargaining agreement between an employer and a labor organization provides otherwise, an employee of the employer if:

(i) the employer is subject to Title II of the federal Railway Labor Act;

(ii) the employer does not require the employee to work more than 40 hours during 1 workweek; and

(iii) the employee voluntarily enters into an agreement with another employee to trade scheduled work hours and as a result the employee works more than 40 hours during a single workweek.