Glazing (Glass)

PURPOSE: This rule describes the procedures and standards for the inspection of glazing. The inspection of glazing is a requirement of section 307.365, RSMo. (1) All 1936 and later model motor vehicles which were originally equipped with glass must have approved safety glass in all doors, windows, and windshields. (2) Automotive safety glass is marked with the manufacturer’s trademark and the words American Standard or the letters AS followed by a number indicating the position in which the glass may be used. Safety glass bearing the following identification may be used in the designated locations: AS1 anywhere in a motor vehicle; AS2 anywhere except windshields; AS3 or AS4 anywhere on school buses except windshields and side windows to immediate right and left of driver location; AS3 and above is permitted at certain other specified locations, such as rear windows of trucks and convertibles. (3) Types of Damage or Defect. (A) Outright breakage: Glass that is severely cracked, shattered, or broken to expose sharp edges or missing pieces. (B) Distortion: A manufacturing defect or other defect that causes a distorted view. (C) Star break: Vented breaks with cracks radiating from point of impact. (D) Bull’s-eye and half moon: Nonvented circular or halfcircular chips not dislodged from glass. (4) Inspect glazing. The driver’s vision area is that area within the normal sweep of the wiper blades above a line measured four inches (4") from the bottom of the windshield. In addition, inspect operation of window at driver’s left. (5) Reject vehicle if— (A) Required glazing is not present or improper glazing materials are used; (B) Window at driver’s left cannot be readily opened to permit arm signals. (Do not reject if the vehicle is equipped with properly operating turn signals and stoplight); (C) After-market vision reducing material or other conditions that obscure the driver’s vision is on the windshield; (D) The windshield has any cracks exceeding three inches (3") in length, within the driver’s vision area; (E) The windshield has any unrepaired star breaks, bull’seyes, or half moons within the driver’s vision area; (F) The windshield has any of the following that are more than two inches (2") in diameter at any area outside the driver’s vision area: star breaks; bull’s-eyes; or half moons; (G) The windshield has any distortion; or (H) Outright breakage, missing pieces, or any break exposing sharp edges is present at any location. AUTHORITY: section 307.360, RSMo 2016.* Original rule filed Nov. 4, 1968, effective Nov. 14, 1968. Amended: Filed March 9, 1970, effective March 19, 1970. Amended: Filed Aug. 13, 1970, effective Aug. 23, 1970. Amended: Filed March 24, 1971, effective April 3, 1971. Amended: Filed Nov. 9, 1971, effective Nov. 19, 1971. Amended: Filed May 21, 1974, effective May 31, 1974. Amended: Filed Dec. 1, 1975, effective Dec. 11, 1975. Amended: Filed Dec. 8, 1975, effective Dec. 18, 1975. Amended: Filed Jan. 12, 1982, effective April 11, 1982. Amended: Filed Aug. 26, 1985, effective Nov. 28, 1985. Emergency amendment filed Aug. 29, 1985, effective Sept. 27, 1985, expired Jan. 25, 1986. Amended: Filed Oct. 8, 1987, effective Jan. 14, 1988. Amended: Filed Aug. 18, 1989, effective Nov. 26, 1989. Amended: Filed April 2, 1992, effective Sept. 6, 1992. Amended: Filed June 2, 1993, effective Nov. 8, 1993. Amended: Filed Oct. 3, 1994, effective April 30, 1995. Emergency rescission and rule filed Aug. 1, 1997, effective Sept. 2, 1997, expired Feb. 28, 1998. Rescinded and readopted: Filed Aug. 1, 1997, effective Jan. 30, 1998. Amended: Filed July 14, 1998, effective Jan. 30, 1999. Amended: Filed Sept. 15, 2000, effective March 30, 2001. Emergency amendment filed Aug. 15, 2001, effective Aug. 28, 2001, expired Feb. 28, 2002. Amended: Filed Aug. 15, 2001, effective Feb. 28, 2002. Amended: Filed Sept. 15, 2003, effective March 30, 2004. Amended: Filed Nov. 18, 2014, effective July 30, 2015. Amended: Filed Oct. 30, 2020, effective June 30, 2021. *Original authority: 307.360, RSMo 1967, amended 1971, 1973, 1979, 1999.