1.2 Normative References reads in part:

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"z/Architecture Principles of Operation, IBM Publication SA22-7832"
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The cited publication does not appear to be available from IBM. I did find:

z/Architecture Principles of Operation (SA22-7832-09)

Question: Will your specification continue to be valid for future revisions of SA22-7832-*?

If so, cite the base reference SA22-7832 and indicate it includes all future editions.

Suggest you insert a URL for this resource: http://www-01.ibm.com/support/docview.wss?uid=pub1sa22783209

Although that appears to point at a specific edition. Is there a "latest" version link?