# Conservation of $C$-Parity and $P$-parity

Under what situations are $C$-Parity $C=(-1)^{L+S}$ and/or $P$-parity $P=-(-1)^L$ conserved? ( $L$ here is the relative angular momentum and S is the total intrinsic spin).

It would make sense that under EM and Strong interactions these two quantities would be conserved, since there are no inherent quark transformations. But I'm unsure about whether or not C-parity and P-parity would be conserved during weak interactions, specifically for meson decay.

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