Log canonical $3$-fold complements

We expand the theory of log canonical $3$-fold complements. We prove that if $X\to T$ is a $3$-dimensional contraction of log Calabi-Yau type, then we can find $B\ge 0$ on $X$ for which $(X,B)$ is log canonical and $n(K_X+B){\sim }_{T}0$, where $n$ is an uniform natural number. This means that every $3$-fold of log Calabi-Yau type can be turned into a log Calabi-Yau pair in an effective way.