Ukubaluleka komnyango womlilo akunakulinganiswa ekulawuleni ukubhebhetheka komlilo, ukuhlukanisa umlilo, ukuqinisekisa ukuphepha kwabasebenzi kanye nokunciphisa ukulahleka kwempahla. Iminyango yomlilo ye-UL isetshenziswa eNyakatho Melika ngisho nakwamanye amazwe nezifunda ezinamazinga aziwayo e-UL.

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