Here's some light reading.
Part 541: http://ecfr.gpoaccess.gov/cgi/t/text...2.3.17&idno=49
Part 543: http://ecfr.gpoaccess.gov/cgi/t/text...2.3.19&idno=49
Code of Federal Regulations (CFR)
Title 49: Transportation
PART 541—FEDERAL MOTOR VEHICLE THEFT PREVENTION STANDARD
PART 543—EXEMPTION FROM VEHICLE THEFT PREVENTION STANDARD
§ 543.6 Petition: Specific content requirements.
(a)(3)(ii) Attract attention to the efforts of an unauthorized
person to enter or move a vehicle by means other than a key,
(a)(3)(iii) Prevent defeating or circumventing the device by an unauthorized
person attempting to enter a vehicle by means other than a key,
(a)(3)(iv) Prevent the operation of a vehicle which an unauthorized
person has entered using means other than a key, and . . .
- - - - - -
Read between the lines above, and look for the words "authorized person
". The immobilizer system can be 'switched off' by an authorized person. The vehicle owner is an authorized person, as is a dealer tech.
The factory race bikes ran EWS to maintain the premise that the immobilizer cannot be switched off.
The premise doesn't require anyone at the race team or dealer level to know about it. The techs readily believe most any myth and superstition that they are told. And highly defend their beliefs.
A 2007 Federal Register announcement of a recent petition for exemption from BMW:
The Petition for Exemption that a company must file, pursuant to CFR 19 Part 543, is a public record.