2.1.256 Part 4 Section 188.8.131.52, tcPr (Table Style Conditional Formatting Table Cell Properties)
a. The standard says the properties in this element apply to the table regions specified by the conditional formatting setting.
In Word, the noWrap, tcMar, and vAlign elements in this element always apply to entire table rows, even if the parent tblStylePr specifies the formatting should be applied to columns or a particular cell.
b. The standard states that the cellDel, cellIns, cellMerge, cnfStyle, gridSpan, hideMark, hMerge, tcFitText, tcPrChange, tcW, textDirection, and vMerge elements are valid children of the tcPr element.
Word does not allow these elements to be children of the tcPr element.