Nothing listed specifically under SE/USE Cables, but here's something you might find useful...

From the '96 NEC

300.11. Securing and Supporting.

Secured in Place. Raceways, cable assemblies, boxes, cabinets, and fittings shall be securely fastened in place...

In addition, Art. 338 (SE/USE cable) & 230 (Services) have references to "Protection from physical damage" of conductors, by the use of conduit (NM or metal).

I hate to fall back on the old saw, but...

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When in doubt, ask your AHJ!