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diff --git a/lib/colonial_twilight/fln_rules.rb b/lib/colonial_twilight/fln_rules.rb
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+#! /usr/bin/env ruby
+# frozen_string_literal: true
+
+module ColonialTwilight
+  # general rules governing operations and activities
+  module FLNRules
+    # Rally 3.3.1
+    def may_rally_in?(space)
+      (space.sector? || (space.city? && !space.support?) || (space.country? && space.independent?))
+    end
+
+    def rally_spaces(board)
+      board.search { |s| may_rally_in? s }
+    end
+
+    # March 3.3.2
+
+    # Attack 3.3.3
+    def may_attack_in?(space)
+      (space.fln_cubes.positive? && space.gov.positive?)
+    end
+
+    def attack_spaces(board)
+      board.search { |s| may_attack_in? s }
+    end
+
+    # Terror 3.3.4
+    def may_terror_in?(space)
+      (!space.country? && !space.pop.zero? && space.fln_underground.positive?)
+    end
+
+    def terror_spaces(board)
+      board.search { |s| may_terror_in? s }
+    end
+
+    # Extort 4.3.1
+    def may_extort_in?(space)
+      (!space.pop.zero? && space.fln_underground.positive? && space.fln_control? &&
+        (space.country? ? space.independent? : true))
+    end
+
+    def extort_spaces(board)
+      board.search { |s| may_extort_in? s }
+    end
+
+    # Subvert 4.3.2
+    def may_subvert_in?(space)
+      (space.fln_underground.positive? && space.algerian_cubes.positive?)
+    end
+
+    def subvert_spaces(board)
+      board.search { |s| may_subvert_in? s }
+    end
+
+    # Ambush 4.3.3
+    def may_ambush_in?(space)
+      may_attack_in?(space)
+    end
+
+    def ambush_spaces(board)
+      board.search { |s| may_ambush_in? s }
+    end
+
+    # OAS 5.3.1
+    def may_oas_in?(space)
+      (!space.country? && !space.pop.zero? && !space.terror.positive?)
+    end
+
+    def oas_spaces(board)
+      board.search { |s| may_oas_in? s }
+    end
+  end
+end