Can British units arriving from West (British Isles) command be placed anywhere in Belgium?
According to Rule 38A1r (Reinforcements and Replacements – Reinforcements – Concepts – Transfer/Arrive), an arrival is the same as receiving a reinforcement (Rule 38A1l). This rule states that the listed unit is received as a reinforcement in the specified district or command (in this case it is the West (France/West Germany) command). So, referring back to Rule 38A, a command-wide reinforcement appears in any friendly-owned city, resource center, or fortress in the command. This qualifies the reinforcements appearing in Belgium.