leidend

guiding (de leidraad zijnd)
guiding principle (de leidraad zijnd)
leading
ABC is determined in XYZ
- (e.g.: Voor de vergoedingen en regels omtrent vergoedingen is het Arrangement van de gebruiker leidend. = The fees and rules regarding fees are determined in the user’s Arrangement.)
primary/basic XXX (e.g.: leidend beginsel = primary/basic principle)
main/principal XXX (leidende gedach = main/principal idea, leitmotiv, keynote)
governs, governing
shall prevail
shall come first
of foremost importance
determinant (A factor which decisively affects the nature or outcome of something)