In fact, Newsome's Executive Orders refer only to GOV § 8567, which only refers to procurement powers of state agencies. It specifically does not create any criminal statute, which in CA happens to be a very involved process including traversing multiple legislative committees.
In other words, he could trigger a process to confiscate your steel if he can establish urgent necessity for all of it, but he can't make it a crime to build a car. You're flat wrong on this.
This is both false and irrelevant; it's false because Newsom’s 39 (to date) executive orders relating to COVID-19 (they are almost daily) reference more than just that section—i.e, the first, EO N-25-20 (3/12/2020), references government code sections 8567, 8571, and 8572 [0]; but more to the point it's irrelevant because while the EOs have some importance in state COVID-19 response, they aren't the shelter-in-place order, which is a Public Health Order issued by the State Public Health Officer / Director of Public Health on March 19, 2020 [1], citing Health and Safety Code Sections 120125, 120140, 131080, 120130(c), 120135, 120145, 120175 and 120150, which pertain to the power of the Department of Public Health to issue such orders and the obligation of local officials to enforce them.
[0] https://www.gov.ca.gov/wp-content/uploads/2020/03/3.12.20-EO...
[1] https://www.cdph.ca.gov/Programs/CID/DCDC/CDPH%20Document%20...