(a) General information.      
        (1) A vehicle or vehicle combination transporting one or more portable building units and portable building compatible cargo that exceed legal length or width limits set forth by Transportation Code, Chapter 621, Subchapters B and C, may obtain a permit under Transportation Code, Chapter 623, Subchapter F.       
        (2) In addition to the fee required by subsection (d), the department shall collect an amount equal to any fee that would apply to the movement of cargo exceeding any applicable width limits, if such cargo were moved in a manner not governed by this section.       
      (b) Application for permit. Applications shall be made in accordance with §219.11(c) of this title (relating to General Oversize/Overweight Permit Requirements and Procedures).     
      (c) Permit issuance. Permit issuance is subject to the requirements of §219.11(b)(2),(e) and (g) of this title.     
      (d) Payment of permit fee. The cost of the permit is $15, with all fees payable in accordance with §219.11(f) of this title. All fees are non-refundable.     
      (e) Permit provisions and conditions.      
        (1) A portable building unit may only be issued a single-trip permit.       
        (2) Portable building units may be loaded end-to-end to create an overlength permit load, provided the overall length does not exceed 80 feet.       
        (3) Portable building units must not be loaded side-by-side to create an overwidth load, or loaded one on top of another to create an overheight load.       
        (4) Portable building units must be loaded in a manner that will create the narrowest width for permit purposes and provide for greater safety to the traveling public.       
        (5) The permit will be issued for a single continuous movement from the origin to the destination for an amount of time necessary to make the move, not to exceed 10 consecutive days.       
        (6) Movement of the permitted vehicle must be made during daylight hours only.       
        (7) A permittee may not transport portable building units or portable building compatible cargo with a void permit; a new permit must be obtained.       
      (f) Escort requirements.      
        (1) A portable building unit or portable building compatible cargo with a width exceeding 16 feet but not exceeding 18 feet must have a front escort flag vehicle on two-lane roadways and a rear escort flag vehicle on roadways of four or more lanes.       
        (2) A portable building unit or portable building compatible cargo exceeding 18 feet in width must have a front and a rear escort flag vehicle on all roadways at all times.       
        (3) The escort flag vehicle must:                  (A) have one red 16 inch square flag mounted on each of the four corners of the vehicle;                   (B) have a sign mounted on the front and rear of the vehicle displaying the words "WIDE LOAD" in black letters at least eight inches high with a brush stroke at least 1.41 inches wide against a yellow background;                   (C) have mounted on top of the vehicle and visible from both front and rear, two simultaneously flashing lights, one rotating amber beacon of not less than eight inches in diameter, or alternating or flashing blue and amber lights; and                   (D) maintain two-way communications with the permitted vehicle and other escort flag vehicles involved with the movement of the permitted vehicle.         
        (4) An escort flag vehicle must comply with the requirements in §219.11(k)(1) and §219.11(k)(7)(A) of this title.       
     Source Note:        The provisions of this §219.15 adopted to be effective October 13, 1994, 19 TexReg 7810; amended to be effective January 8, 1998, 23 TexReg 155; amended to be effective February 21, 1999, 24 TexReg 1221; amended to be effective February 16, 2006, 31 TexReg 888; amended to be effective June 1, 2008, 33 TexReg 3776; transferred effective January 1, 2012, as published in the Texas Register January 27, 2012, 37 TexReg 359; amended to be effective June 28, 2015, 40 TexReg 4003; amended to be effective December 30, 2020, 45 TexReg 9582