(2) The Secretary concerned may also authorize payment of that allowance to a member of the armed forces in a retired status for any day on which the member serves in a funeral honors detail under section
1491 of title
10, if the time required for service in such detail (including time for preparation) is not less than two hours. The amount of an allowance paid to a member under this paragraph shall be in addition to any other compensation to which the member may be entitled under this title or title 10 or 38.