This sounds very wrong and I can’t find anything about this. Can you cite your source?
Seems correct. The CBA wording has changed from 2017 version to 2023 for MLE's (see below):
Wording on Room MLE:
2023: "....use the Mid-Level Salary Exception for Room Teams
to sign and/or acquire by assignment one (1) or more Player Contracts....."
2017: "the Team may at such time use the Mid-Level Salary Exception for Room Teams
to sign one (1) or more Player Contracts"
The wording on Non-Taxpayer MLE:
2023: "A Team may use the Non-Taxpayer Mid-Level Salary Exception
to sign and/or acquire by assignment one (1) or more Player Contracts during each Salary Cap Year......"
2017: "A Team may use the Non-Taxpayer Mid-Level Salary Exception
to sign one (1) or more Player Contracts during each Salary Cap Year"
The wording on Taxpayer MLE is still the same:
2023: "A Team may use the Taxpayer Mid-Level Salary Exception
to sign one (1) or more Player Contracts during each Salary Cap Year"
2017: "A Team may use the Taxpayer Mid-Level Salary Exception
to sign one (1) or more Player Contracts during each Salary Cap Year"