I find it not surprising that the AIP refused to embargo, and that the
ACS embargoes.
The American Chemical Society (ACS) <http://www.acs.org/> has once again
pioneered, under its "zealot" interpretation of "embargo" by Department
of Treasury's Office of Foreign Asset Control, by terminating membership
of its long-time members in Iran; many of these members are past Ph.D.
Alumni of American universities. Several years ago, the ACS undertook a
similar unilateral measure, unprecedented by other sister professional
societies, and under the same law, when it unilaterally stopped
accepting scholarly and research manuscripts from Iranian scientists
for the three dozen periodicals in its publication division.
"... Paradoxically, and as in the past, the American Physical Society in
contrast states, 'We have NO plan to do anything similar, and continue
to serve our members in Iran.' Judy Franz of the APS further stated
that, "We would resist having to obtain a license to the extent we can.'"