1. (a) DOT containers may not be refilled, continued in service, or transported unless they are properly qualified or requalified for LP-gas service in accordance with the DOT regulation.
2. (b) Such containers shall at all times be plainly stamped to show that they have been requalified within the required test period.
3. (c) DOT containers must be requalified before filling after the expiration of 12 years from the original manufacturer's inspection date. This retest and/or inspection may be performed as follows.
4. (d) A container manufactured in January 1980 requires test or inspection prior to January 1992. If it is then stamped 1-92, it is qualified until January 2004 (expansion test method); if it is stamped 1-92S (internal hydrostatic test method), it is qualified until January 1999; and, if it is stamped 1-92E, it is qualified until January 1997 (external visual inspection method).
5. (e) Regardless of tests performed, each container must be carefully inspected for defects at the time of each filling and removed from service if any signs of defects are observed as set forth in §9.74 of this title (relating to Examination of Containers).

Source Note:The provisions of this §9.303 adopted to be effective June 1, 1994, 19 TexReg 3151.