2.1.252 Part 1 Section 17.7.6.6, tblStylePr (Style Conditional Table Formatting Properties)
a. The standard specifies the precedence order in which conditional formatting should be applied.
When specified, Office applies conditional formats in the following order (therefore subsequent formats override properties on previous formats):
Odd row banding, even row banding
Odd column banding, even column banding
First column, last column
First row, last row
Top left, top right, bottom left, bottom right
Refer to ST_TblStyleOverrideType, §17.18.89(a) for information about the conditional formatting values Microsoft Office recognizes.