In any case in which an offender agrees to an intervention program, a specific agreement must be made between the solicitor and the offender. This agreement shall include the terms of the intervention program, the length of the program and a section stating the period of time after which the prosecutor will either dismiss the charge or seek a conviction based upon that charge. The agreement must be signed by the offender and his or her counsel, if represented by counsel, and filed in the solicitor’s office. The Commission on Alcohol and Drug Abuse shall provide training if requested on the recognition of alcohol and drug abuse to counselor employees of local pretrial intervention programs and the local agency authorized by § 61-12-20 shall provide services to alcohol and drug abusers if referred by pretrial intervention programs. However, no services may be denied due to an offender’s inability to pay.