On Tue, 19 Jul 2011 12:50:20 -0700, Skip Robinson wrote:

>RENT is honored--i.e. failed if violated--only if the load library is APF
>authorized.
>
From:

  z/OS V1R12.0 MVS Initialization and Tuning Reference

    
http://publib.boulder.ibm.com/infocenter/zos/v1r12/index.jsp?topic=/com.ibm.zos.r12.ieae200/progref.htm

Using the REFRPROT statement

z/OS V1R12.0 MVS Initialization and Tuning Reference
SA22-7592-21

Use the REFRPROT statement type to specify that REFR programs are protected 
from modification by placing them in key 0, non-fetch protected storage, and 
page protecting the full pages. For more information on protection of REFR 
programs, see z/OS MVS Program Management: User's Guide and Reference.

|The handling that CONTENTS SUPERVISION provided for |REFR modules from 
APF-authorized libraries can be extended to non-APF |libraries if you set this 
value to REFRPROT. In other words, when |REFRPROT is in effect with MVS for APF 
libraries, they can be extended |to non-APF libraries as well.

Naturally, since it's new some z/OS programmers will think it's no good,
or too much like UNIX or Windows or such.

-- gil

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