(A) As used in this section:

1. (1) In addition to the meaning in section 3307.01 of the Revised Code, when appropriate "compensation" has the same meaning as in section 3309.01 of the Revised Code.
2. (2) "Earnable salary" has the same meaning as in section 145.01 of the Revised Code.
3. (3) "STRS position" means a position for which a member of the state teachers retirement system is making contributions to the system.
4. (4) "Other state retirement system" means the public employees retirement system or the school employees retirement system.
5. (5) "State retirement system" means the public employees retirement system, state teachers retirement system, or the school employees retirement system.

(B)

1. (1) Subject to division (E) of this section, a member of the state teachers retirement system who holds two or more STRS positions may retire under section 3307.57, 3307.58, or 3307.60 of the Revised Code or under an STRS defined contribution plan from the position for which the annual compensation at the time of retirement is highest and continue to contribute to the retirement system for the other STRS position or positions.
2. (2) Subject to division (E) of this section, a member of the state teachers retirement system who also holds one or more other positions covered by the other state retirement systems may retire under section 3307.57, 3307.58, or 3307.60 of the Revised Code or under an STRS defined contribution plan from the STRS position and continue contributing to the other state retirement systems if the annual compensation for the STRS position at the time of retirement is greater than annual compensation or earnable salary for the position, or any of the positions, covered by the other state retirement systems.
3. (3) Subject to division (E) of this section, a member of the state teachers retirement system who holds two or more STRS positions and at least one other position covered by one of the other state retirement systems may retire under section 3307.57, 3307.58, or 3307.60 of the Revised Code or under an STRS defined contribution plan from one of the STRS positions and continue contributing to the state teachers retirement system and the other state retirement system if the annual compensation for the STRS position from which the member is retiring is, at the time of retirement, greater than the annual compensation or earnable salary for any of the positions for which the member is continuing to make contributions.
4. (4) Subject to division (E) of this section, a member of the state teachers retirement system who also holds one or more other positions covered by the other state retirement systems may retire under section 145.37, 3307.57, or 3309.35 of the Revised Code or under a plan established under section 145.81 or 3309.81 of the Revised Code from one of the other state retirement system positions and continue contributing to the state teachers retirement system if the annual compensation for the other state retirement system position from which the member is retiring is, at the time of retirement, greater than the annual compensation for any of the positions for which the member is continuing to make contributions.
5. (5) A member of the state teachers retirement system who has retired as provided in division (B)(2) or (3) of section 145.383 or division (B)(2) or (3) of section 3309.343 of the Revised Code may continue to contribute to the state teachers retirement system for an STRS position if the member held the position at the time of retirement from the other state retirement system.
6. (6) A member who contributes to the state teachers retirement system in accordance with division (B)(1), (3), (4), or (5) of this section shall contribute in accordance with section 3307.26 of the Revised Code. The member's employer shall contribute as provided in section 3307.28 of the Revised Code. Neither the member nor the member's survivors are eligible for any benefits based on those contributions other than those provided under section 145.384, 3307.352, or 3309.344 of the Revised Code.

(C)

1. (1) In determining retirement eligibility and the annual retirement allowance of a member who retires as provided in division (B)(1), (2), (3), or (4) of this section, the following shall be used to the date of retirement:

   1. (a) The member's earnable salary and compensation for all positions covered by a state retirement system;
   2. (b) Total service credit in any state retirement system, except that the credit shall not exceed one year of credit for any period of twelve months;
   3. (c) The member's accumulated contributions.
2. (2) A member who retires as provided in division (B)(1), (2), (3), or (4) of this section is a retirant for all purposes of this chapter, except that the member is not subject to divisions (F) and (G) of section 3307.35 of the Revised Code for a position or positions for which contributions continue under those divisions or division (B)(5) of this section.