Bluebook question for those in a law review/journal

I'm in charge of editing footnotes for a paper. In one of the footnotes, the author cites a federal regulation with a long name inside a parenthetical, and then he uses "hereinafter" inside the parenthetical to shorten the citation for subsequent footnotes. Here's what it looks like for reference:

FCC v. Fox Television Studios, Inc., 556 U.S. 502, 515 (quoting Importation of Fruits and Vegetables, 60 Fed. Reg. 50,379 (Sept. 29, 1995) (to be codified at 16 C.F.R. pt. 300) [hereinafter Import Rule 1995]).

Is this even allowed? I know Bluebook Rule 4.2 allows using "hereinafter" to shorten regulations when they are particularly lengthy, but I've never seen someone use it inside a parenthetical.

It seems somewhat illegal. I've never used it this way. Also, there is already a short form for citing regulations, so using "hereinafter" seems kinda dumb. I also don't want to use "supra" to refer to it again later. Any ideas?