(c) "Displaced person" means, except as otherwise provided in this paragraph (c), any person who moves from real property, or moves his personal property from real property, as a direct result of a written notice of intent to acquire or the acquisition of other real property in whole or in part for a program or project undertaken by an agency with public financial assistance; or real property on which such person is a residential tenant or conducts a small business, a farm operation or a business as defined in this section, as a direct result of rehabilitation, demolition or such other displacing activity as the displacing agency may prescribe, under a program or project undertaken by a displacing agency with public financial assistance in any case in which the head of the displacing agency determines that such displacement is permanent; and solely for the purposes of Sections 43-39-7 and 43-39-13, Mississippi Code of 1972, any person who moves from real property or moves his personal property from real property as a direct result of a written notice of intent to acquire or the acquisition of other real property, in whole or in part, on which such person conducts a business or farm operation, for a program or project undertaken by a displacing agency with public financial assistance; or as a result of rehabilitation, demolition or such other displacing activity as the displacing agency may prescribe, of other real property on which such person conducts a business or a farm operation, under a program or project undertaken by a displacing agency with public financial assistance where the displacing agency determines that such displacement is permanent. In the case of a partial acquisition, the displacing agency shall make the determination whether the person is displaced. The term "displaced person" does not include a person who has been determined, according to criteria established by the head of the agency, to be either in unlawful occupancy of the displacement dwelling or to have occupied such dwelling for the purpose of obtaining assistance under this title, nor, in any case in which the displacing agency acquired property for a program or project, any person (other than a person who was an occupant of such property at the time it was acquired) who occupies such property on a rental basis for a short term or a period subject to termination when the property is needed for the program or project.