Every military service obligation (MSO) is 8 years. No way his is only 7. Likely it’s 3 years active and 5 reserve (active or IRR). Typically non scholarship ROTC or OCS is 3 active, ROTC scholarship is 4, and service academy 5. At least that’s what I remember.

A PCS ADSO in the army conus to conus is 1 year. Everything ADSO related can be found in AR350-100...just open the pdf and search PCS.

http://dopma-ropma.rand.org/pdf/AR350-100.pdf