Cabinet of Ministers Regulations are Latvia's secondary legislation implementing the EU drone framework at national level. The abbreviation "MK Nr." stands for "Ministru kabineta noteikumi Nr." — the number of a specific regulation.
Four matter most to a drone pilot: MK Nr. 457 on the operator registry, MK Nr. 436 on remote-pilot qualification, MK Nr. 447 on insurance minima, and MK Nr. 248 on airspace and BGKIS. The EU regulations set the common principles; these acts define how they work specifically in Latvia.