Are Prior Service allowed to retake the ASVAB more than once?

I am looking to re-enlist but to apply for OCS and come back in as an Officer. I originally took the ASVAB out of HS, during that time I had no idea what the test was or had ever considered joining the military until some months later (mind you this was 2008). After speaking with a recruiter, I was told that I could retake the ASVAB, however prior service is only allowed a one time go at a re-take. Anybody have insight into this or if this is true? I want to ensure I secure atleast a 110GT score to meet the qualifications for OCS, however I am extremely anxious now that if I don't make it-- that's my one and only shot.

Thanks!