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Is anybody acquainted with the prhase "Derecho del prespuesto", I am confused because of the preposition in Spanish, which sounds more natural as "Derecho AL presupuesto". Should I translate the phrase as "The bugetary right", "the right of the budget"? Because the right to budget allocations would rather correspond in Spanish to "derecho a asignaciones presupuestarias".

The context is the following:

Dada la vastedad del interrogante me centraré aquí en una de las facetas más complejas de la política fiscal: el derecho del presupuesto, en cuanto técnica legal para asignar recursos públicos.

Thanks!