Component : MIM
The MIM’s security requirements, as indicated by the by Labs, are documented here:
So,it is not documented/required that MIM needs to have the TRUSTED attribute.
That said, checking the IBM link about the TRUSTED attribute explanation and requirements, it is documented that this attribute is used for tasks which access a wide variety of unpredictably named data sets within the installation and MIM doesn't do that.
Here the IBM link:
where it can be underlined that the IBM equivalent address spaces (CONSOLE and GRS) are not listed as tasks which mandatory require this attribute and below an additional suggestion reported in the Guidelines section: