Existing Wording
applies[x] - the time or period that this observation was made on the subject. Each observation has multiple times - prepared, made, reported etc - but the important time is when the data relates to the patient condition

Proposed Wording
applies[x] - the time or period that this observation was made on the subject. Each observation may have multiple times - prepared, made, reported etc.

Comments
Not clear what "when the data relates to the patient condition" means. For instance, if my blood pressure is measured as 130/90 on Dec. 21st at 08:22am, the measurement dtime is clear, but unclear how to say anything, else about when it "applies" or "relates to" the patient condition. 10 minutes later, 2 hours later, would that latest BP measurement still "apply?" I suggest simply deleting the last clause. The Notes on this element in 4.20.5 and the Detailed Definition in 4.20.7 are OK, so it's just this initial definition in 4.20.2. that is unclear and unnecessary.

Grahame's Comments
no opinion