Umnyango womlilo we-UL ubhekisela kumnyango womlilo ojwayelekile waseMelika, osetshenziswa eNyakatho Melika nakwamanye amazwe nezifunda eziqaphela izindinganiso ze-UL. Ihluke kwezinye iminyango yomlilo, isici esisobala seminyango yomlilo yase-American Standard ukuthi iminyango yomlilo yase-American Standard idinga ukuhlolwa ngesando samanzi omlilo. Siyakwamukela ukuxhumana nathi.