Auxiliary aids means services or devices that enable individuals with impaired sensory, manual, or speaking skills to have an equal opportunity to participate in, and enjoy the benefits of, programs or activities conducted by OSC. For example, auxiliary aids useful for individuals with impaired vision include readers, Braille materials, audio recordings, and other similar services and devices. Auxiliary aids useful for individuals with impaired hearing include telephone handset amplifiers, telephones compatible with hearing aids, telecommunication devices for deaf individuals (TDDs), interpreters, notetakers, written materials, and other similar services and devices. Complete complaint means a written statement that contains the complainant's name and address and describes OSC's alleged discriminatory action in sufficient detail to inform OSC of the nature and date of the alleged violation of Section 504. It shall be signed by the complainant or by someone authorized to do so on the complainant's behalf. Complaints filed on behalf of classes or third parties shall describe or identify (by name, if possible) the alleged victims of discrimination. Days means calendar days, unless otherwise stated. Facility means all or any portion of buildings, structures, equipment, roads, walks, parking lots, rolling stock or other conveyances, or other real or personal property. Historic properties means those properties that are listed or eligible for listing in the National Register of Historic Places or properties designated as historic under a statute of the appropriate State or local government body. Individual with a disability means any individual who has a physical or mental impairment that substantially limits one or more major life activities, has a record of such an impairment, or is regarded as having such an impairment. The following phrases used in this definition are further defined as follows: Physical or mental impairment includes—