Just a suggestion

emergency measures have been taken for
des mesures d'exception ont été prises
For judiciary/legal and political decisions.

--------------------------------------------------
Note added at 2002-08-29 09:48:02 (GMT)
--------------------------------------------------

If the text is referring to the rulers - from a coup - you might try unlegitimate regime

is my suggestion

Exemple: This exceptional regime regarding the sanctioning of some crimes against property was also provided for in the Criminal Code of 1968, but only for the situations when those crimes were committed against personal or private property, and not if they were committed against the social property, in which case the rule of the criminal trial being carried out ex officio was enforced exclusively.
Or:
The freedom of movement given to the programme was not accompanied by the managerial rigour and tight control which should have been the corollary of this exceptional regime.

This can be used as you can see in political, law, trade agreements etc.
Good luck

Specific emergency constitutional provisions have allowed governments to constitute--in all meaning of that word--a regime of exception. As Brian Loveman points out in a superb account of Latin American constitutional history, such a regime of exception allows a temporary suspension of existing constitutional provisions in order to give executive authorities far-reaching powers to reorganize the governmental apparatus.

http://www.hawaii.edu/aplpj/2/4b.html

--------------------------------------------------
Note added at 2002-08-29 10:13:51 (GMT)
--------------------------------------------------

In the regime of exception based on the
commissarial, ultimately Roman, model, one institution of a
constitutional regime is given the power to temporarily act outside
of constitutional limits. As is well known, according to Schmitt, in
the Weimar Republic it was the presidency that could, under
specific circumstances (and within never clarified limits), assume
such extraordinary and largely extralegal powers. Schmitt,
however-at least until the final crisis of Weimar-prohibited the
emergency dictator from innovating to materially change the
constitution in the name of which his own suspension was to be
justified. When, during crisis, the legitimate dictator changes the
constitution, we encounter the occurrence of the auto-golpe-the
coup of the state against itself, or rather, of part of the government
against its other parts.

http://www.gongfa.com/shimitehemeiguo.htm

--------------------------------------------------
Note added at 2002-08-29 10:15:36 (GMT)
--------------------------------------------------

In the regime of exception based on the
commissarial, ultimately Roman, model, one institution of a
constitutional regime is given the power to temporarily act outside
of constitutional limits. As is well known, according to Schmitt, in
the Weimar Republic it was the presidency that could, under
specific circumstances (and within never clarified limits), assume
such extraordinary and largely extralegal powers. Schmitt,
however-at least until the final crisis of Weimar-prohibited the
emergency dictator from innovating to materially change the
constitution in the name of which his own suspension was to be
justified. When, during crisis, the legitimate dictator changes the
constitution, we encounter the occurrence of the auto-golpe-the
coup of the state against itself, or rather, of part of the government
against its other parts.

http://www.gongfa.com/shimitehemeiguo.htm

but "regime" implies illegitimacy in itself: it may be enough.

A political regime resulting from a coup or the like.

"a political phrase referring to a non-legitimate regime i.e. one in which the Leader... has not been elected."

In the Asker's context, just throwing out some ideas for others to play with...