British and US CVE - building are limited by .
British and US CVE - building are do not count against the limit ( i.e. the USA may use her NAT of 4 to build 4 NAS and 4 CVE factors each turn ) .
British and US CVE - building are limited by , but do not count against the limit ( i.e. the USA may use her NAT of 4 to build 4 NAS and 4 CVE factors each turn ) .