Thank you for sharing your question and situation here. Many of us are encountering the same scenario.
Honestly, I jumped the gun. The NBA workshop "Nemeth within UEB Contexts, Parts 1 & 2" and its examples were written based on a preview of coming updates to the Guidance for Transcription Using Nemeth Code within UEB Contexts; and those proposed updates have still not been approved and published by BANA.
So, officially, all we have to go by is the Guidance for Transcription Using the Nemeth Code within UEB Contexts Approved June 2016, which says that whether a unit of measure is abbreviated or not it should be in the Nemeth switch indicators.
The updates on which the workshop "Nemeth within UEB Contexts, Parts 1 & 2" was based are up for discussion at BANA's April board meeting, and we fervently anticipate the official publication of the version of the Guidance on which this workshop was based. Until that time, the workshop and the Guidance are out of sync. Upcoming NBA workshops, webinars, and publications on using the Nemeth Code within UEB contexts will be in sync with the officially published Guidance.
Again thank you for your question. Thank you also for your understanding.