By law all seatbelts must be retractable. You can check the operation of seat belts by pulling the seatbelt firmly and checking the holding power. Remember to check the seat belt mechanism for signs of dust and/or fatigue from time to time. Ragged or rough edges mean its time to replace the seat belts. Nylon belts deteriorate in sunlight over time so watch for signs of disintegration. If in doubt have your seatbelts checked by a professional mechanic.