WiFi standard is rectified by an International Body - IEEE which located in the USA. The standards issued by IEEEsuch as 11b, 11g and 11a are international standard. WiFi use unregulated frequency band, the same band is used by Dec (cordless phones). In fact, you have more channels to select in USA than UK.
I really do not think you need to worry about this.
At the worst case (suppose I missed someting which I do not think so as an IEEE fellow), you just disable on-board WiFi and buy a compitable WiFi card for a few dolloars to use with it.