Housing minister shoots down idea floated by Maroš Šefčovič designed to help reset UK-EU discussions Housing minister shoots down idea floated by Maroš Šefčovič designed to help reset UK-EU discussions Šefčovič referred to the idea of the UK joining the Pan-Euro-Mediterranean Convention (PEM). These are common rules that allow parts, ingredients and materials for manufacturing supply chains to be sourced from across dozens of countries in Europe and North Africa to be used in tariff-free trade.