I think Goodchild's post did not show the entire list of people qualified to be technical supervisor; for CLIA it states that a bachelor's is also acceptable for a Technical Specialist:
Bachelors in medical technology, chemical, physical, or biological science AND 4 years training/experience in high complexity testing in the respective specialty
It's not that you can't have MLTs in the Blood Bank at all, but you have to prove that 24/7, 365 days a year, you have to also have someone qualified as a Technical Supervisor there at all times to directly observe the MLTs. It can't just be a supervisor in another dept if they don't know Blood Bank. This person can also help the department supervisor do some of the more higher level reviews, such as QC review, reviewing antibody ID workups, reviewing exceptions, etc, but only if they also qualify by NYSDOH's standards for a supervisor, which is 6 years working as a licensed technologist.