2.1.152 Part 4 Section 2.4.42, tblCellSpacing (Table Row Cell Spacing)

For additional notes that apply to this portion of the standard, please see the notes for bottom, §2.4.2(a, b).

a.   The standard states that any width value of type pct or auto for this element shall be ignored.

Word uses a default value of 0 for the width when the value of the type attribute is pct or auto.