Exhibit 31.3
CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Martin J. Duvall, certify that:
1. | I have reviewed this Amendment No. 1 to the annual report on Form 10-K of Tocagen Inc.; and |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: April 29, 2020 |
| /s/ Martin J. Duvall |
|
| Martin J. Duvall Chief Executive Officer (Principal Executive Officer) |