Seismic Restraining Strap for Seismic Clamps

Question on seismic bracing for fire sprinkler:

NFPA 13
9.3.5.11 Sway Brace Installation
9.3.5.11.10 C-type clamps including beam and large flange clamps with or without restraining straps, shall not be used to attach braces to the building structure.

I typically see Cooper B-line fig.828 used, the universal seismic clamp on the beam flange. Do they have to be used with a retaining strap on the beam? Manufacturer's instructions is silent in this regard.

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