It is hereby declared to be the policy of the State of Maryland, in the exercise of its police power for the protection of the public safety, public health and general welfare, for the maintenance of business and good government and for the promotion of the State's trade, commerce and manufacturers to assure all persons equal opportunity in receiving employment and in all labor management-union relations regardless of race, color, religion, ancestry or national origin, sex, age, marital status, sexual orientation, or disability unrelated in nature and extent so as to reasonably preclude the performance of the employment, and to that end to prohibit discrimination in employment by any person, group, labor organization, organization or any employer or his agents.