Re: 2019 Elections
Edit 2: So I was mistaken on the issue. It wasn't about expiration of a ratification, it was whether a deadline in a congressional resolution can be enforced(?) and if so, how.
I think...
From Wiki:
Congress had originally set a ratification deadline of March 22, 1979, for the state legislatures to consider the ERA. Through 1977, the amendment received 35 of the necessary 38 state ratifications.[note 1] With wide, bipartisan support (including that of both major political parties, both houses of Congress, and Presidents Nixon, Ford and Carter)[5] the ERA seemed destined for ratification until Phyllis Schlafly mobilized conservative women in opposition. These women argued that the ERA would disadvantage housewives, cause women to be drafted into the military and to lose protections such as alimony, and eliminate the tendency for mothers to obtain custody over their children in divorce cases.[6] Many labor feminists also opposed the ERA on the basis that it would eliminate protections for women in labor law, though over time more and more unions and labor feminist leaders turned toward supporting it.
Five state legislatures (Idaho, Kentucky, Nebraska, Tennessee, and South Dakota) voted to revoke their ERA ratifications. Four claim to have rescinded their ratifications before the original March 22, 1979, ratification deadline, while the South Dakota legislature did so by voting to sunset its ratification as of that original deadline. However, it remains a legal question as to whether a state can revoke its ratification of a federal constitutional amendment.
In 1978, Congress passed (by simple majorities in each house), and President Carter signed, a joint resolution with the intent of extending the ratification deadline to June 30, 1982. Because no additional state legislatures ratified the ERA between March 22, 1979, and June 30, 1982, the validity of that disputed extension was rendered academic.[7] Since 1978, attempts have been made in Congress to extend or remove the deadline.
Edit: And this entire section:
https://en.wikipedia.org/wiki/Equal..._ratifications_and_the_"three-state_strategy"