I have to admit... The FAA has really used common sense to craft the new changes.... Not like something the guvmint does very often.
https://www.faasafety.gov/files/notices/2012/Oct/Class_B_Airspace_Change_SLC_.pdf
https://www.faasafety.gov/files/notices/2012/Oct/Class_B_Airspace_Change_SLC_.pdf