News of the lawsuit appeared in the Houston Chronicle (paywall) more than a week ago. The Green and Libertarian Parties both received mention in the headline. The Texas Tribune got its version of the story out on 11 July, and RawStory picked it up the next day.
Palmer herself is listed as a plaintiff, sharing billing with the Libertarian, Constitution, and America's Parties of Texas. TSU law professor Thomas Kleven, who in 2016 ran for Congress in TX-18, also appears on the list.
But...HB 2504! Why Sue Now?
In light of HB 2504 becoming state law this year, guaranteeing Texas Greens a ballot line through 2026, why would GPTX press the issue via a lawsuit? Why would the Libertarians and Railroad Commission candidate Mark Miller, who pulled off a 5% coup in a four-way race in 2016, join in?