bodies of seals or apparatus or implements suitable
for killing or taking seals, or if any licensed vessel shall be found
in the waters to which this act applies having on board apparatus or
implements suitable for taking seals, but forbidden then and there to
be used, it shall be presumed that the vessel in the one case and the
apparatus or implements in the other was or were used in violation of
this act until it is otherwise sufficiently proved.

SEC. 11. That it shall be the duty of the President to cause a
sufficient naval force to cruise in the waters to which this act is
applicable to enforce its provisions; and it shall be the duty of the
commanding officer of any vessel belonging to the naval or revenue
service of the United States, when so instructed by the President, to
seize and arrest all vessels of the United States found by him to be
engaged, used, or employed in the waters last aforesaid in violation
of any of the prohibitions of this act or of any regulations made
thereunder, and to take the same, with all persons on board thereof, to
the most convenient port in any district of the United States mentioned
in this act, there to be dealt with according to law.

SEC. 12. That any vessel or citizen of the United States or person
described in the first section of this act offending against the
prohibitions of this act or the regulations thereunder may be seized and
detained by the naval or other duly commissioned officers of Her Majesty
the Queen of Great Britain, but when so seized and detained they shall
be delivered as soon as practicable, with any witnesses and proofs on
board, to any naval or revenue officer or other authorities of the
United States, whose courts alone shall have jurisdiction to try the
offense and impose the penalties for the came: _Provided, however_,
That British officers shall arrest and detain vessels and persons as in
this section specified only after, by appropriate legislation, Great
Britain shall have authorized officers of the United States duly
commissioned and instructed by the President to that end to arrest,
detain, and deliver to the authorities of Great Britain vessels and
subjects of that Government offending against any statutes or
regulations of Great Britain enacted or made to enforce the award of
the treaty mentioned in the title of this act.

Now, therefore, be it known that I, Grover Cleveland