There is an increasing tendency to use may have in place of might have: You were lucky the gun didn't go off you may have been killed. In most cases the meaning will be perfectly clear from the context, but occasionally ambiguity may arise, and the may have/might have distinction is a useful one to keep.
White symbolizes justice and the promise of the future. Blue stands for prosperity. Red represents unity and purpose and the blood shed during the struggle for freedom. Effective date: 4 December 1975.