Buckingham Palace faces new allegations of racist and discriminatory hiring practices, according to bombshell documents uncovered by The Guardian .

In a report published Wednesday, The Guardian revealed that in 1968 it was not, in fact, the practice to appoint coloured immigrants or foreigners to serve in Buckingham Palace clerical roles, though minorities and foreigners were reportedly allowed to work as domestic servants.

The Guardian said the practice continued until at least the late 1960s and that Buckingham Palace refused to answer questions about the ban and when it was revoked. The palace did add that its records showed people from ethnic minority backgrounds being employed in the 1990s and that it did not record the racial backgrounds of employees before the 1990s.

The Guardian pointed out that Queen Elizabeth has been exempt from workplace equality laws for over four decades.