The short answer is that every time you take her out in what would be an “off-leash setting,” she needs to wear a 30 foot long line and training collar.
EVERY TIME!
After a few months, she’ll get conditioned to the long line and forget it’s on. And all the while, you’ll also be conditioning her to come THE FIRST TIME you call her.
When you see that she’s coming 100% of the time, around a variety of different settings and distractions, then you can substitue the long line for the 1 foot tab.
-Adam