if PassOptionsToPackage usepackage
Source
\if@somecondition
\PassOptionsToPackage{<options>}{<package>}
\endif
%...
\usepackage[<more options>]{<package>}
if PassOptionsToPackage usepackage
Source
\if@somecondition
\PassOptionsToPackage{<options>}{<package>}
\endif
%...
\usepackage[<more options>]{<package>}