United States 12 Month Natural Gas Fund (UNL) S-1 IPO registration

Exhibit 23.2(b)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to incorporation by reference in this Registration Statement on Form S-1 for United States 12 Month Natural Gas Fund, LP of our report dated March 25, 2015 relating to the statements of financial condition as of December 31, 2014 and 2013of United States Commodity Funds LLC and Subsidiaries included in the Form 10-K of United States 12 Month Natural Gas Fund, LP for the year ended December 31, 2014, and to the reference to our Firm as “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ SPICER JEFFRIES LLP                                        

Greenwood Village, Colorado

March 21, 2016