If a member of the Arkansas Teacher Retirement System has service credited during the same fiscal year with another reciprocal system and the combined service is greater than one (1) year of service credit, the Arkansas Teacher Retirement System shall credit service as follows:

1. (1) If credit by the reciprocal system is less than three (3) months, the Arkansas Teacher Retirement System shall credit service for one (1) year;
2. (2) If credit by the reciprocal system is three (3) or more months but less than six (6) months, the Arkansas Teacher Retirement System shall credit service for three­fourths (3/4) year;
3. (3) If credit by the reciprocal system is six (6) or more months but less than nine (9) months, the Arkansas Teacher Retirement System shall credit service for one-half (1/2) year; and
4. (4) If credit by the reciprocal system is for nine (9) months but less than twelve (12) months, the Arkansas Teacher Retirement System shall credit service for one-fourth (1/4) year.