“And when he saw them, hee said vnto them, Goe shew your selues vnto the Priests. And it came to passe, that as they went, they were cleansed.”
1611 King James Version (KJV)
Lu 17:14 Go shew yourselves. To be officially pronounced clean, a certificate had to be obtained from the priests (see PNT "Mt 8:4"). They were cleansed. As they went, an act of faith, they were healed. Not one would have been healed if he had disobeyed.