Section 4 AAC 18.021 - Employment of substitute teachers(a) A person employed to replace a teacher who district authorities know will be absent for more than 20 days in which the school is in session must possess a valid teacher's certificate from this state.(b) If district authorities know that a teacher will be absent for more than 20 in-session days, the district must employ a long-term substitute teacher (1) who holds a certificate issued under 4 AAC 12.305, 4 AAC 12.345, 4 AAC 12.355, or 4 AAC 12.360; and(2) under the requirements imposed by this chapter.(c)If district authorities know that a teacher will be absent for more than 20 in-session days and are unable to employ a qualified applicant who holds a certificate issued under 4 AAC 12.305, 4 AAC 12.345, 4 AAC 12.355, or 4 AAC 12.360, the district may employ an individual who holds a retired teacher certificate (Type R) issued under 4 AAC 12.380 as a long-term substitute teacher for up to 120 days.(d)If a substitute teacher who does not possess a valid teacher's certificate from this state is hired to fill a vacancy at the start of the school year for 20 in-session days or less, a district must notify the department not later than August 31.Eff. 1/22/81, Register 77; am 2/5/2017, Register 221, April 2017