ollector and naval officer of our several principal ports,
which has introduced so much order and accuracy in our system. It is
suggested that as in some cases the attention of the commandant of the
port might be necessary for the performance of other duties that he be
permitted to substitute some other officer, making known the fact to the
Secretaries of War or of the Navy, and subject to their direction.

I have the honor to be, with great respect, your obedient servant,

R.J. WALKER,
_Secretary of the Treasury_.

WASHINGTON, _March 31, 1847_.

SIR:[15] Being charged by the Constitution with the prosecution of the
existing war with Mexico, I deem it proper, in the exercise of an
undoubted belligerent right, to order that military contributions be
levied upon the enemy in such of their ports or other places as now are
or may be hereafter in the possession of our land and naval forces by
conquest, and that the same be collected and applied toward defraying
the expenses of the war. As one means of effecting this object, the
blockade at such conquered ports will be raised, and they will be opened
to our own commerce and that of all neutral nations in articles not
contraband of war during our military occupation of them, and duties on
tonnage and imports will be levied and collected through the agency of
our military and naval officers in command at such ports, acting under
orders from the War and Navy Departments.

I transmit to you herewith, for your information and guidance, a copy of
a communication addressed by me to the Secretary of the Treasury on the
23d instant, instructing him to examine the existing Mexican tariff and
to report to me, for my consideration, a scale of duties which he would
recommend to be levied on tonnage and imports in such conquered ports,
together with such regulations as he would propose as necessary and
proper in order to carry this policy into effect; and also a copy of the
report of the Secretary of the Treasury made on the 30th instant in
answer to my communication to him. The scale of duties and the
regulations for their collection as military contributions exacted from
the enemy, recommended by the Secretary of the Treasury in this report,
have been approved by me.

You will, after consulting with the Secretary of the Navy, so as to
secure concert of action between the War and Navy Departments, issue
the necessary orders to carry the measure proposed into immediate effect.