Morevoer, after 1c (1d) x (1H) there is no standard on what dble from opener should show. Most standard is to treat this as psyche revealing, as it is virtually a cliche for rho to bid a major when he has long diamonds, similar to 1c x 1h x.
I would guess standard is 1s = 3, dble = 4 hearts, 2S = 4 Pass = wk NT without 3 spades or four (reasonable) hearts. 1N = 18-19.
PS: Have you ever played in europe RHM? I understand that the ACBL has done a pretty good job of stamping out innovation and variety in systems in the ACBL, but for a good player not to have come across a variety of treatments for this kind of auction is shocking to me. There is enough uncertainty about auctions like this in the UK that I would not feel comfortable my partner would know how many spades 1S showed unless we had a specific agreement. Its like 1c-1d-1h-1s. Everyone thinks their treatment is "std".
