fill_the_ministry_effect

fill_the_ministry_effect = {
	save_scope_as = councillor_liege
	# Assign a grand chancellor
	if = {
		limit = {
			OR = {
				NOT = { exists = cp:councillor_chancellor }
				cp:councillor_chancellor ?= {
					NOT = { has_title = title:e_minister_chancellor }
				}
			}
		}
		random_vassal = {
			limit = {
				tgp_can_be_a_minister_trigger = { COURT_OWNER = scope:councillor_liege }
				tgp_is_any_minister = no
			}
			weight = {
				base = 1
				modifier = {
					add = diplomacy
				}
			}
			got_minister_position_effect = { MINISTER_TITLE = e_minister_chancellor MINISTER_POSITION = councillor_chancellor }
		}
	}
	# Assign an imperial censor
	if = {
		limit = {
			OR = {
				NOT = { exists = cp:councillor_spymaster }
				cp:councillor_spymaster ?= {
					NOT = { has_title = title:e_minister_censor }
				}
			}
		}
		random_vassal = {
			limit = {
				tgp_can_be_a_minister_trigger = { COURT_OWNER = scope:councillor_liege }
				tgp_is_any_minister = no
			}
			weight = {
				base = 1
				modifier = {
					add = intrigue
				}
			}
			got_minister_position_effect = { MINISTER_TITLE = e_minister_censor MINISTER_POSITION = councillor_spymaster }
		}
	}
	# Assign a grand marshal
	if = {
		limit = {
			OR = {
				NOT = { exists = cp:minister_grand_marshal }
				cp:minister_grand_marshal ?= {
					NOT = { has_title = title:e_minister_grand_marshal }
				}
			}
		}
		random_vassal = {
			limit = {
				tgp_can_be_a_minister_trigger = { COURT_OWNER = scope:councillor_liege }
				tgp_is_any_minister = no
			}
			weight = {
				base = 1
				modifier = {
					add = martial
				}
			}
			got_minister_position_effect = { MINISTER_TITLE = e_minister_grand_marshal MINISTER_POSITION = minister_grand_marshal }
		}
	}
	# Assign a minister of personnel
	if = {
		limit = {
			OR = {
				NOT = { exists = cp:minister_personnel }
				cp:minister_personnel ?= {
					NOT = { has_title = title:e_minister_of_personnel }
				}
			}
		}
		random_vassal = {
			limit = {
				tgp_can_be_a_minister_trigger = { COURT_OWNER = scope:councillor_liege }
				tgp_is_any_minister = no
			}
			weight = {
				base = 1
				modifier = {
					add = diplomacy
				}
			}
			got_minister_position_effect = { MINISTER_TITLE = e_minister_of_personnel MINISTER_POSITION = minister_personnel }
		}
	}
	# Assign a minister of revenue
	if = {
		limit = {
			OR = {
				NOT = { exists = cp:councillor_steward }
				cp:councillor_steward ?= {
					NOT = { has_title = title:e_minister_of_revenue }
				}
			}
		}
		random_vassal = {
			limit = {
				tgp_can_be_a_minister_trigger = { COURT_OWNER = scope:councillor_liege }
				tgp_is_any_minister = no
			}
			weight = {
				base = 1
				modifier = {
					add = stewardship
				}
			}
			got_minister_position_effect = { MINISTER_TITLE = e_minister_of_revenue MINISTER_POSITION = councillor_steward }

As written in game/common/scripted_effects/10_dlc_tgp_scripted_effects.txt.