Md. Code, Education § 26–703

This subtitle does not require a nonpublic prekindergarten program or nonpublic school that is religiously affiliated to enroll, retain, or extend privileges to a student or prospective student who does not meet the usual and regular qualifications, requirements, and standards of the program or school or to adopt any rule, regulation, or policy that conflicts with the program or school’s religious or moral teachings, provided that the denial, rule, regulation, or policy is not based on discrimination on the grounds of race, ethnicity, color, religion, sex, age, national origin, marital status, sexual orientation, gender identity, or disability.