A certificate of need shall not be required for any institution previously owned and operated for or in behalf of a city not within a county which chooses to be licensed as a facility defined under subdivision (22) or (23) of section 198.006 for a facility of ninety beds or less that is owned or operated by a not-for-profit corporation which is exempt from federal income tax as an organization described in section 501(c)(3) of the Internal Revenue Code of 1986, which is controlled directly by a religious organization and which has received approval by the department of health and senior services of plans for construction of such facility by August 1, 1995, and is licensed by the department of health and senior services by July 1, 1996, as a facility defined under subdivision (22) or (23) of section 198.006 or for a facility, serving exclusively mentally ill, homeless persons, of sixteen beds or less that is owned or operated by a not-for-profit corporation which is exempt from federal income tax which is described in section 501(c)(3) of the Internal Revenue Code of 1986, which is controlled directly by a religious organization and which has received approval by the department of health and senior services of plans for construction of such facility by May 1, 1996, and is licensed by the department of health and senior services by July 1, 1996, as a facility defined under subdivision (22) or (23) of section 198.006 or an assisted living facility located in a city not within a county operated by a not for profit corporation which is exempt from federal income tax which is described in section 501(c)(3) of the Internal Revenue Code of 1986, which is controlled directly by a religious organization and which is licensed for one hundred beds or less on or before August 28, 1997.