6 Del. C. ch. 46 § 4607

(a) Nothing in this chapter shall prohibit a religious organization, association or society, or any nonprofit institution or organization operated, supervised or controlled by or in conjunction with a religious organization, association or society, from limiting the sale, rental or occupancy of dwellings which it owns or operates for other than a commercial purpose to persons of the same religion, or from giving preference to such persons, unless membership in such religion is restricted on account of race, color or national origin.

(b) Nothing in this chapter shall prohibit a private club not in fact open to the public, which as an incident to its primary purpose or purposes provides lodgings which it owns or operates for other than a commercial purpose, from limiting the rental or occupancy of such lodgings to its members or from giving preference to its members, unless membership in such private club is restricted on account of race, color or national origin.

(c) Nothing in this chapter limits the applicability of any reasonable local, state or federal restrictions regarding the maximum number of occupants permitted to occupy a dwelling as long as they are applied to all occupants and do not operate to discriminate or have the effect of discriminating on the basis of race, color, national origin, religion, creed, sex, marital status, familial status, source of income, age, sexual orientation, gender identity, disability, military status, or housing status. Nor does any provision in this chapter regarding familial status or age apply with respect to “housing for older persons” as defined in § 4602 of this title.

(d) Housing shall not fail to meet the requirements for housing for older persons by reason of:

(1) Persons residing in such housing as of September 1, 1992 who do not meet the age requirements of § 4602(17)b. or c. of this title; provided, that new occupants of such housing meet the age requirements of § 4602(17)b. or c. of this title;

(2) Unoccupied units: provided, that such units are reserved for occupancy by persons who meet the age requirements of § 4602(17) b. or c. of this title; or

(3) Persons under 18 years of age residing in such housing with a person or persons who do meet the age requirements of § 4602(17)b. or c. of this title provided that:

a. Such person under 18 years of age must move into the housing by reason of death, serious injury or serious illness of the parent, guardian or person acting in the place of a parent with whom such person under 18 years of age resided immediately before the time of such death, serious injury or serious illness; and

b. Occupancy by the person under 18 years of age is of a temporary nature terminating when reasonably practicable.

(e) Nothing in § 4603 of this title, except paragraph (b)(3) thereof, or in § 4603A of this title, shall apply to rentals of rooms or units in dwellings containing living quarters occupied or intended to be occupied by no more than 4 families living independently of each other, if the owner actually maintains and occupies 1 of such living quarters as that owner’s residence.

(f) Nothing in this chapter shall prohibit discrimination on the basis of sex for single sex student dormitories, fraternities, sororities, other housing or portion thereof of an educational institution certified, chartered, or established by the State and operated for students of that educational institution, provided that such educational institution provides reasonable accommodations to permit access to and use of such facilities consistent with a student’s gender identity.

(g) Nothing in this chapter shall prohibit a religious organization, association, or society, or any nonprofit institution or organization operated, supervised or controlled by or in conjunction with a religious organization, association, or society, from discriminating on the basis of sex for single sex dormitories or portions thereof where such discrimination on the basis of sex is necessary for the safety of individuals in such dormitories or to preserve the personal privacy of such individuals, unless such organization, association, society or institution restricts its membership on account of race, color or national origin.

(h) The prohibitions in this chapter against discrimination based on source of income shall not limit the ability of any person to consider the sufficiency or sustainability of income, or the credit rating of a renter or buyer, so long as sufficiency or sustainability of income, and the credit requirements, are applied in a commercially reasonable manner and without regard to source of income.

(i) The prohibitions in this chapter against discrimination based on source of income shall not limit the ability of any housing authority or related agency having oversight over the provision of housing assistance from prohibiting such authority’s employees or agents from renting housing to persons who receive such assistance, where such prohibition is intended to prevent conflicts of interest or the appearance of impropriety, nor shall this chapter prohibit such agents and employees from complying with any such prohibition on renting housing to persons receiving such assistance.

(j) The denial of a rental application under § 5116(e)(2) of Title 25 may not serve as the basis for any administrative or judicial proceeding under this chapter.

(k) The prohibitions in this chapter against discrimination based on source of income shall not limit the ability of a landlord participating in any government-sponsored rental assistance program, voucher, or certificate system from reserving rental units for tenants who qualify for such governmental program.

(l) Nothing in this chapter prohibits a distinction or differential treatment on the basis of military status that is expressly allowed by Delaware law or regulation, federal law or regulation, or government contract.