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The uniqueness of the hypercharge assignments in the three fermion familiesleptoquark-bilepton $SU(3)_C \times SU(4)_L \times U(1)_N$ model isestablished. Although the gauge group contains an explicit U(1) factor, freedomfrom triangle anomalies combined with the requirement of nonvanishing chargedfermion masses uniquely fix the electric charges of all fermions independentlyof the neutrinos being massless or not. The electric-charge quantization,family replication, and the existence of three colors are interwoven.Comment: 13 page

CHARGE QUANTIZATION IN THE LARGEST LEPTOQUARK–BILEPTON CHIRAL ELECTROWEAK SCHEME