The Internal Revenue Service today (April 20, 2017) released an advanced copy of guidance under the Protecting Americans for Tax Hikes Act of 2015 (PATH Act) regarding amendment to (i) expensing section 179 property, (ii) the additional first year depreciation deduction under section 168(k), and (iii) the qualified Indian reservation property depreciation provision under section 168(j). 

Revenue Procedure 2017-33 will be in IRB 2017-19 on May 8.  The advanced copy is available here.