"That's a section 3A, Mr. Scamander. I'm taking you in."
--Tina Goldstein (WFT)
A specific and very serious type of MACUSA law violation that risks exposure of the magical community.
Tina Goldstein arrested Newt Scamander for a Section 3A when she learned that he had not wiped the memory of a No-Maj (Jacob Kowalski) who witnessed magic.
Arresting Newt for a Section 3A was important enough for Tina to go straight to President Picquery (WFT).