emission

Hi all, Why would a single frequency have both NXDN and DMR emission designations assigned to it? Do some entities actually switch between the two or is this more of a "we selected all the things just in case" type of situation? Here is an example...

What Does These Common Emission Designators Mean? 11K2F2D 11K2F3E 20K0F3E 20KOF2D