In 1971, the brain-child of conceptual art dealer Seth Siegelaub and New York lawyer Robert Projansky revolutionized art purchase transactions. Set against the backdrop of a turbulent 1960’s that mirrors continued inequities today – think: the civil rights movement, women artist’s committees, art worker’s rights – The Artist’s Reserved Rights Transfer and Sale Agreement, also known as ARRTSA; the Siegelaub-Projanksy…