CREATE TABLE table_203_679 (id DECIMAL, "part" TEXT, "number" TEXT, "first public release date  ( first edition ) " DECIMAL, "latest public release date  ( edition ) " DECIMAL, "latest amendment" TEXT, "title" TEXT, "description" TEXT)

which part was published latest ?
SELECT "part" FROM table_203_679 ORDER BY "first public release date (first edition)" DESC LIMIT 1
SELECT "part" FROM "table_203_679" ORDER BY "first public release date (first edition)" DESC NULLS LAST LIMIT 1