No State can unilaterally transfer sovereignty. Richmond’s authority extents to the State line.

In the US Constitution the only venue for changing this would be the consent of both legislatures and the Federal Congress under –

Article IV – The States, Section 3 – “New States”

“New States may be admitted by the Congress into this Union; but no new States shall be formed or erected within the Jurisdiction of any other State; nor any State be formed by the Junction of two or more States, or parts of States, without the Consent of the Legislatures of the States concerned as well as of the Congress.

The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States; and nothing in this Constitution shall be so construed as to Prejudice any Claims of the United States, or of any particular State.”

Additionally –

Under the Virginia Constitution, Virginia’s sovereignty rests with the people of Virginia (Virginia Constitution, Article I, Section 2) and the General Assembly cannot surrender or delegate Virginia’s sovereignty to another State.  Nor can the General Assembly or Virginia administrative officials try to make Virginians subject to laws or regulations promulgated by other States (Virginia Constitution, Article I, Section 6).  Legislative or administrative convenience does not excuse or justify Virginia officials enacting statutes or promulgating regulations that surrender or delegate any portion of Virginia’s sovereign powers to another State.

Richmond's authority stops at the State lines, as with all States. That is a bedrock of Federalism. You would need the permission of Sacramento and Congress. It was never voted on. Therefore, it is void, it is a usurpation power beyond the purview of the legislature and executive. I hope this goes to the Virginia Supreme Court or better yet to the US Supreme Court to put this to bed.