No, it doesn't. The tachograph registers the main activity for any given click minute as the only activity for the full minute. So you theoretically have 29 seconds every minute to move without resetting your rest period, for a total of 58 consecutive seconds by taking the last 29 seconds from one minute and the first 29 seconds for the next.

This is how you do it: Start a stopwatch just as the tacho tips a minute. Any minute works, clock or pause time. Then let it run for 30 seconds, before you start moving after the stopwatch passes 30. You can now, in theory, move freely until the next 30 second mark on the stopwatch. Make sure to come to a full stop a few seconds beforethey're next 30s mark so the tacho has time to register that the truck has stopped and got you to change the activity back to rest. Also make sure to leave time for the second or so of reaction time before you actually stated your stopwatch.

Now you must stand still on rest until the next time the watch passes 30s, then repeat.

When the tacho rounds a full minute, you can see that your rest time goes back to what it was originally, confirming that it has registered the full minute as rest.

Try it out until you are comfortable with it some time it does not matter if you miss, for example at the start of a long rest period. It can come in very handy one time you really need it.