Scott,
I am not familiar with "C-CDATemplateLibrary_2012_12_21.docx"
The correct document is titled "CDAR2_IG_IHE_CONSOL_DSTU_R1dot1_2012JUL.pdf"
The key section is "4.33 Medications Section 10160-0" which begins on p. 252 of that document.
"Medication Supply Order" is one of many possible entries that can be contained within a "Medications Section," but I think that others would be more relevant, such as "Medication Dispense."
Thom