  For an affine Lie algebra $\hat{\mathfrak g}$ the coefficients of certain
vertex operators which annihilate level $k$ standard $\hat{\mathfrak
g}$-modules are the defining relations for level $k$ standard modules. In the
paper \cite{PS3} combinatorial structure of the leading terms of mentioned
relations for level $k=2$ standard $\hat{\mathfrak g}$-modules and affine Lie
algebras of type $C_{n}\sp{(1)}$ is given. The main result of this paper is a
construction of combinatorially parameterized relations among relations of
$C_{2}\sp{(1)}$-standard modules for all levels.
