| Date | Description |
|---|
| 2022-05-07 |
delete president Leon Chalnick |
| 2022-05-07 |
update person_title Leon Chalnick: CEO, Noted Author, Lecturer; President => CEO, Noted Author, Lecturer |
| 2020-01-10 |
delete president Leon Chalnick |
| 2020-01-10 |
update person_title Leon Chalnick: CEO, Noted Author, Lecturer; President => CEO, Noted Author, Lecturer |
| 2019-12-10 |
insert president Leon Chalnick |
| 2019-12-10 |
update person_title Leon Chalnick: CEO, Noted Author, Lecturer => CEO, Noted Author, Lecturer; President |
| 2014-06-27 |
delete president Leon Chalnick |
| 2014-06-27 |
update person_title Leon Chalnick: CEO, Noted Author, Lecturer; President => CEO, Noted Author, Lecturer |