Rubric for blessing and sprinkling

In Paul Turner's Blog by Paul Turner

Q:  Where can we find the rubric that the blessing and sprinkling may take the place of the Penitential Rite?
A:  The rubric for the sprinkling is found in the missal. Look for the Order of Mass in the middle of the book. Paragraph 4 opens the section on the Penitential Act, which has a footnote directing you to the appendix for the blessing and sprinkling of water.