Any
person under the age of twenty-one (21) years, who purchases or attempts
to purchase, or has in his/her possession, any intoxicating liquor
as defined in Section 311.020, RSMo., or who is visibly intoxicated
as defined in Section 577.001, RSMo., or has a detectable blood alcohol
content of more than two-hundredths of one percent (.02%) or more
by weight of alcohol in such person's blood is guilty of a misdemeanor.
For purposes of prosecution under this Section or any other provision
of this Chapter involving an alleged illegal sale or transfer of intoxicating
liquor to a person under twenty-one (21) years of age, a manufacturer-sealed
container describing that there is intoxicating liquor therein need
not be opened or the contents therein tested to verify that there
is intoxicating liquor in such container. The alleged violator may
allege that there was not intoxicating liquor in such container, but
the burden of proof of such allegation is on such person, as it shall
be presumed that such a sealed container describing that there is
intoxicating liquor therein contains intoxicating liquor.