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(108)(21) Despite S5.7 of TSD 108, the colour of retroreflective sheeting applied in accordance with S5.7.1.4.1(a) and S5.7.1.4.2 of TSD 108 may be white, yellow, white and yellow or white and red, in accordance with S5.7.1.2 of TSD 108 or section 3.1.3, 3.1.2 or 3.1.1, respectively, of SAE Standard J578, Color Specification (May 1988).
(108)(22) If the retroreflective sheeting referred to in S5.7.1.2 of TSD 108 is applied to a non-vertical surface, the entrance angle used to demonstrate that the sheeting conforms to the photometric requirements prescribed by that section shall be the sum of the entrance angle specified in column 1 of Figure 29 of TSD 108 and the angle, measured at the horizontal centreline of the sheeting, by which the sheeting deviates from the vertical.
(108)(23) The retroreflective sheeting applied to the rear of a trailer in accordance with S5.7.1.4.1(c) of TSD 108 shall be located not more than 760 mm above the road surface and extend to within 450 mm of the extreme outer edges of the trailer.
(108)(24) If a vehicle is equipped with yellow retroreflective sheeting, the sheeting shall conform to the photometric requirements set out in the table to this subsection:
TABLE
| Column 1 | Column 2 | Column 3 | ||
| Minimum Coefficient of Retroreflection (cd/lx/m2) | ||||
| Item | Grade | Entrance Angle (in degrees) | Observation Angle of 0.2° | Observation Angle of 0.5° |
| 1. | DOTC2 | -4 | 188 | 49 |
| 2. | DOTC2 | 30 | 188 | 49 |
| 3. | DOTC2 | 45 | 45 | 11 |
| 4. | DOTC3 | -4 | 124 | 32 |
| 5. | DOTC3 | 30 | 124 | 32 |
| 6. | DOTC3 | 45 | 30 | 8 |
| 7. | DOTC4 | -4 | 94 | 25 |
| 8. | DOTC4 | 30 | 94 | 25 |
| 9. | DOTC4 | 45 | 23 | 6 |