Complex sentence: Details are laid down in the government's "Geschäftsordnung" (rules for internal procedure) which states, for example, that the cabinet is quorate if at least half of the ministers including the chair are present.
Split into simpler sentences: Details are laid down in the government's rules for internal procedures ("Geschäftsordnung"). These state, e.g., that the cabinet is quorate only if at least half of the ministers including the chair are present.