If you live in MUD 47 and are a registered voter in Montgomery County you're eligible to vote. Here's a map of MUD 47 so you can see if you live within its boundaries. MUD 47 is shaded in gray.
The southeast section is west of Gosling and north of Woodlands Parkway, it goes north to Research but is bound on the west by Falconwing and Cochran's Crossing.
In the northern section MUD 47 stretches all the way west to 2978, north to 1488 and east to the Panther Branch greenbelt.