For Parliament, no, that is not the case.
For the government, in some cases, the G7 summit for example, I did not have interpreters on contract who could work at the G7, because they had to speak four languages. But some freelancers are accredited by the United Nations and have done G7 and G20 meetings in the past. So yes, we do hire interpreters in some cases who do not have our accreditation.