Upon release, the parolee goes to a parole office and is assigned a parole officer. Parole officers make unannounced visits to parolees' houses or apartments to check on them. During these home visits officers look for signs of drug or alcohol use, guns or illegal weapons, and other illegal activities. Should parolees start to use drugs or alcohol, they are told to go to drug or alcohol counseling and Narcotics Anonymous or Alcoholics Anonymous meetings. Should they not comply with conditions on the parole certificate (including abstention from voting) a warrant is issued for their arrest. Their parole time is stopped when the warrant is issued and starts only after they are arrested. They have a parole violation hearing within a specified time, and then a decision is made by the parole board to revoke their parole or continue the parolee on parole. In some cases, a parolee may be discharged from parole before the time called for in the original sentence if it is determined that the parole restrictions are no longer necessary for the protection of society (this most frequently occurs when elderly parolees are involved).