Gallatin City-County Board of Health extends local mask rule, amends other COVID-19 restrictions The Board of Health will revisit the mask rule in early May and last updated 2021-04-06 00:26:25-04 GALLATIN COUNTY â On Monday morning, the Gallatin City-County Board of Health voted 7-2 to extend the emergency face covering rule until May 27. âIâm hopeful that we will be able to rescind it sooner but I donât want it to be a situation where we are left out of a mask mandate when we actually really need one,â said Christopher Coburn, board member. Health Officer Matt Kelley reported COVID-19 cases in Gallatin County were trending upward since the last meeting and told board members he recommended keeping the mask rule.