| 1.6.2. | The coefficient of retro-reflection of the exposed specimen when dry shall be not less than 80 per cent of the value in paragraph 5. of this Regulation. | a0c0 |
| 1.6.2. | The coefficient of retro-reflection of the exposed specimen when dry shall be not less than 80 per cent of the value in paragraph 5. of this Regulation. | a0c0 |