surveyor_perk_mustering_effect

surveyor_perk_mustering_effect = {
	if = {
		limit = {
			government_has_flag = government_is_settled
			has_perk = mustering_the_troops_perk
			location = {
				exists = barony
				barony.holder = root 
				has_stationed_regiment = yes
			}
		}
		location = {
			switch = {
				trigger = has_stationed_regiment_of_base_type
				skirmishers = {
					add_province_modifier = {
						modifier = mustered_skirmishers
						years = 15
					}
				}
				archers = {
					add_province_modifier = {
						modifier = mustered_archers
						years = 15
					}
				}
				light_cavalry = {
					add_province_modifier = {
						modifier = mustered_light_cavalry
						years = 15
					}
				}
				pikemen = {
					add_province_modifier = {
						modifier = mustered_pikemen
						years = 15
					}
				}
				heavy_infantry = {
					add_province_modifier = {
						modifier = mustered_heavy_infantry
						years = 15
					}
				}
				siege_weapon = {
					add_province_modifier = {
						modifier = mustered_siege_weapon
						years = 15
					}
				}
				heavy_cavalry = {
					add_province_modifier = {
						modifier = mustered_heavy_cavalry
						years = 15
					}
				}
				elephant_cavalry = {
					add_province_modifier = {
						modifier = mustered_elephant_cavalry
						years = 15
					}
				}
				camel_cavalry = {
					add_province_modifier = {
						modifier = mustered_camel_cavalry
						years = 15
					}
				}
				archer_cavalry = {
					add_province_modifier = {
						modifier = mustered_archer_cavalry
						years = 15
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/00_wanderer_lifestyle_effects.txt.