I believe it's been enforced at the MN Regionals for the last 4 or 5 years, and tends to slow things up at registration. I have no problem expecting teams to have enough safety glasses to cover all of their pit crew and drive team members (which actually is stated in the Admin Manual), but as others have said, many times said members are wearing their glasses so finding four to bring to registration isn't always trivial, and adds one more thing for an overwhelmed rookie team to worry about Thursday morning. I can also understand if there was a requirement to have four additional sets to share with visitors or as extras for your own team, but this isn't called out anywhere until the team contact gets to the front of the registration line and is asked where their glasses are. Perhaps it's a holdover from an older manual or checklist and just hasn't bubbled up as a high priority to clean up (and I'm not arguing that it should - everyone manages to make it through check-in eventually)
