If your friend has visited this studio with a trial or a membership in the last 3 months, they will not be eligible to use a Bring a Friend code.
A visitor can use Bring a Friend no more than once at the same studio in a rolling 30-day period. They may use Bring a Friend at another studio during that period, provided they meet all other eligibility rules.
Once 3 months have passed since that trial or membership visit, they may use the code provided they meet all other eligibility rules, including the rolling 30-day Bring a Friend limit at that studio.