I found this on Delaware:
utdoor housing facilities. —
(1) Restrictions. — Dogs that are not acclimated to the outdoor temperatures prevalent in the area or region where they are maintained and breeds of dogs that cannot tolerate the prevalent outdoor temperatures without stress or discomfort (such as short-haired breeds in cold climates) may not be kept in outdoor facilities unless the practice is specifically approved by a licensed veterinarian.
(2) Shelter from the elements. — Dogs shall be provided with proper shelter to protect them against inclement weather, preserve their body heat, and allow them to remain dry during rain or snow. Sufficient clean bedding material or other means of protection from the weather shall be provided when the ambient temperature falls below the temperature to which the dog is acclimated. Additional bedding material or other means of protection shall be provided when the temperature is 35°F (1.7°C) or lower.
(3) Shelter from sunlight. — In addition to the shelter structure, 1 or more separate outside areas of shade shall be provided to allow the dogs to protect themselves when sunlight is likely to cause overheating or discomfort.
(4) Construction. — Housing facilities for dogs shall be constructed to provide for the health and comfort of the animals. The floors and walls of outdoor housing facilities shall be constructed and maintained so that they are substantially impervious to moisture and may be readily sanitized. Mobile or traveling housing facilities, metal barrels, cars, refrigerators or freezers, and the like shall not constitute proper shelter.