Strict L0 .. the massage will be non-sensual, no teasing and she will remain out of reach. Any attempt will be met with firm refusal.
L0 because of house rules but provider wants a good tip .. she will tease you during the massage and allow some touching but no L0 even after multiple visits.
L0 because of house rules but provider does it on the sly .. you will get teasing and touching but it will take a few visits before she trusts you and does L1.
L0 only because provider does not want to do more .. this one is the holy grail. Many of us do many repeat visits here to try break her resolve