When you work with tables, the paragraph rules assign paragraph-level formatting to content in the rows and columns. In the following example, the rules assign the Table Heading style to cells in the first row, Table Body Text to cells in the first column, and Table Body Text to cells in the last column. However, where cells are at the intersection point for row and column rules then either rule can be used in that cell.
The table rules are defined for the row or column and the allowed style: