Спасибо, нашла этот пунктик, полис сертификат)
Important: Police certificates expire after one year, unless the certificate was issued from your country of previous residence and you have not returned there since the police certificate was issued. If at the time of your interview the following three items are all true, you must bring a new police certificate to your visa interview:
You are more than 16 years old; The police certificate submitted to NVC was obtained more than one year ago; and You still live in the country that issued the certificate.