49 C.F.R. § 175.706
Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.
Cite as 49 C.F.R. § 175.706 (2026)
No person may carry in an aircraft any package of Class 7 (radioactive) materials required by § 172.403 of this subchapter to be labeled Radioactive Yellow-II or Radioactive Yellow-III closer than the distances shown in the table below to any package marked as containing underdeveloped film.
Transport index
Minimum separation distance to nearest undeveloped film for various times in transit
Up to 2 hours
2 to 4 hours
4 to 8 hours
8 to 12 hours
Over 12 hours
Meters
Feet
Meters
Feet
Meters
Feet
Meters
Feet
Meters
Feet
0.1 to 1.0
0.3
1
0.6
2
0.9
3
1.2
4
1.5
5
1.1 to 5.0
0.9
3
1.2
4
1.8
6
2.4
8
3.3
11
5.1 to 10.0
1.2
4
1.8
6
2.7
9
3.3
11
4.5
15
10.1 to 20.0
1.5
5
2.4
8
3.6
12
4.8
16
6.6
22
20.1 to 30.0
2.1
7
3
10
4.5
15
6
20
8.7
29
30.1 to 40.0
2.4
8
3.3
11
5.1
17
6.6
22
9.9
33
40.1 to 50.0
2.7
9
3.6
12
5.7
19
7.2
24
10.8
36
- Cross-references to the CFR
- 172.403