Try this
Code:
[NAPARA]
UIName=Name:NAPARA
Name=ParaTrooper Upgrade
BuildCat=Combat
Image=NAPARA_A
Prerequisite=NACNST,CARESC
TechLevel=1
Armor=steel
Sight=1
Owner=British,French,Germans,Americans,Alliance,Russians,Confederation,Africans,Arabs,YuriCountry
AIBasePlanningSide=0
Cost=750
Points=30
Power=-10
Crewed=no
Capturable=no
Explosion=TWLT070,S_BANG48,S_BRNL58,S_CLSN58,S_TUMU60
PowersUpBuilding=CARESC
PowersUpToLevel=-1
ThreatPosed=0
HasStupidGuardMode=False
AIBuildThis=yes
SuperWeapon=AmericanParaDropSpecial
BuildLimit=1