Page-level and block-level attributes

Hi

When testing several XSL-FO software products I came across a difference 
in implementing the standard. There are some properties used on a 
page-level objects and the standard is not clear if they may be used 
there. The page-level objects are:
-fo:simple-page-master
-fo:region-body

According to the standard the can use the [7.10 Common Margin 
Properties-Block] 
<http://www.w3.org/TR/xsl/slice7.html#common-margin-properties-block> . 
In this block there are several properties:
- margins (margin-top, margin-bottom, margin-left, margin-right)
- spaces (space-before, space-after)
- indents (start-indent, end-indent.)

The confusions is in the XSL Definiton "Applies to:"
Margins Apply to: all elements
spaces and indents Apply to: all block-level formatting objects.

If I look at reference sources as zvon.org and the excellent book of 
 Dave Pawson, it is stated that spaces and indents may also be used on 
page-level objects as fo:simple-page-master and fo:region-body. The only 
formatter that implements this is XSL-formatter from Antenna House. FOP 
and XEP don't implement it this way (XEP even stops).

Who is wrong? Standard, references, or software?

Harm Kok