My question involves criminal records for the state of: Texas

I was recently chosen for an internship position requiring a security clearance. Work begins on 6/13 and I was concerned about whether or not my past would be an issue. When I was 16, I plead no contest to a class C misdemeanor which after doing community service, I think would be considered a conviction. I did not mention this on my application because at the time of application, I was not aware that it was in fact a conviction. Now my question is whether or not I should call my recruiter to inform the company of my conviction while considering the following:

http://www.tyc.state.tx.us/programs/...9_records.html

Does a security clearance qualify as a reason to access a restricted juvenile record?

Appreciate any help.