Maryland Statutes
Subtitle 5 - Wage Payment and Collection
Section 3-503 - Deductions

An employer may not make a deduction from the wage of an employee unless the deduction is:
        (1)    ordered by a court of competent jurisdiction;
        (2)    authorized expressly in writing by the employee;
        (3)    allowed by the Commissioner because the employee has received full consideration for the deduction; or
        (4)    otherwise made in accordance with any law or any rule or regulation issued by a governmental unit.