My simple translation. For Nicaragua, it is too late...
"NATIONAL DIRRECION OF RADIO And MANAGUA TELEVISION, D.N., NICARAGUA, C.A.
INSTRUCTIONS: The form (at the ARRL website - WI7B) must used by a Radio ham of the United States or Canada to obtain permission for amateur radio activities in Nicaragua as per the reciprocity agreement:
To send to a letter request with two photos and photocopy of Amateur Radio License of his country (the USA or Canada), sending its (60) sixty day before the date that the Radio ham wishes to visit Nicaragua.
To answer the Questionnaire for this class of permission, in Spanish, typing or by hand in legible black ink. On the day of arrival in Nicaragua, the Radio ham must appear at the National Direction of Radio and Television (Department of Frequencies), for registration and to obtain its Permission."
Also for Costa Rico please note the following corrections at the bottom of the webpage cited above...
"Addition From: "ROBERT A VOSS" <TELEGRAPHY@prodigy.net
Date: Thu, 31 May 2001 18:56:05 -0500
The information for Costa Rica is not correct. To get a TI license (other than TI9) you go to the Ministry and you bring:
Letter (preferably in Spanish), asking for permission, giving your in-country address(es), period of operation.
one copy of passport,
one copy of license, and they keep both.
you bring along:
original of license,
original passport (they did not even look at mine)
15 minutes later, no fee, you have license.
I did this April 2001. (N4CD/TI2, April 4-17, 2001) see < http://www.qsl.net/ti2hmg
for my story and that of German ham who found things the exact same way. Bob Voss, N4CD"
"...changed adress in mid 2003 to:
Control Nacional de Radio (CNR)
Ministerio de Gobernación y Policía
75 m Norte del la Antigua Pulperia La Luz
a mano derecha casa blanca
about 2 kilometers east of the center of San Jose."