16.1.1. An extendible trailer shall comply with all the requirements of paragraph 15. when closed to its minimum length; when the trailer is extended, however, the LPD shall comply with paragraphs 15.6., 15.7., and 15.8., and with either paragraph 5.2. or 15.3., but not necessarily both; extension of the trailer shall not produce gaps along the length of the LPD; a0c0