You might think it would have something to do with the Dunder Mifflin paper company's Scranton branch, but actually it's a Los Angeles Department of City Planning (zoning) document showing revisions to the L.A. Municipal Code. Specifically, Section 12.22.C.20(f).
After seeing "the Beaver letter," I intended to do a similar thing by getting a screencap of whatever insane things Creed writes at his "blog," "Creed Thoughts" (www.creedthoughts.gov.www/creedthoughts). Shorpy has already done that, as well (I was the "Anonymous Tipster" who asked Dave about it in the comments, and he came through!):