Texas officials have postponed the runoff primaries from May 26 to July 14. The order did not mention the question of the independent candidate petition deadline. For non-presidential independents, it is 30 days after the runoff primary. But the independent presidential petition is not tied to the date of any primary, and is set inflexibly for May 11. Independent presidential petitions require 79,939 signatures. Thanks to Jim Riley for this news.
Independent statewide candidates require 83,435 signatures. There are 3 senatorial candidates, who can not circulate petitions until after the primary runoff. They will have 30 days (until August 13) to circulate petitions.
Meanwhile write-in candidates have an unlimited period of time, only need to collect 5000 signatures and have four additional days before the filing deadline. In Texas, names of write-in candidates are posted in each voting booth.
Yes, the number of signatures for statewide presidential independents is slightly less than the number for non-presidential statewide independents.