The phrase 'regardless of whether there is' is correct and usable in written English.
This phrase is typically used to indicate that something will happen or remain the same regardless of a particular situation or condition. For example, "We will proceed with the project regardless of whether there is a shortage of resources."
Wear a raincoat, buttoned and belted, regardless of whether there is rain.
It could be used for any treatment, minor or major, regardless of whether there is an effective treatment already available.
The requirements of this paragraph apply to all filings under this part, regardless of whether there is a cross-reference to § 31.26.
Combined CEO-Chairs tond to get paid more relative to the rest of their executive team regardless of whether there is a Lead Director on the board.
While we're putting a lot of resources in the South and East, he said, the system needs to work regardless of whether there is an American flag.
What the Greeks called agape, wanting the good and growth of the other, is special regardless of whether there is, or is not, a god.
(1) Regardless of whether there is a low or high start-bidding price, more bidders lead to higher end-prices, especially with high start-bidding prices.
France is one of a handful of countries that routinely seek criminal indictments in transportation accidents, regardless of whether there is clear evidence of criminal intent or negligence.
Regardless of whether there is a noisy uproar or the threat of violence, by definition, hostile environment discrimination interferes with the right of students to access the educational program because it creates exclusion.
They also want Elsevier to "allow authors to post accepted manuscripts to any [noncommercial subject] repository, as well as to university repositories, regardless of whether there is a posting mandate," and to include this in their publishing agreement with authors.
