Regulators proposal would postpone Dodd-Frank rules until July 2012.

U.S. Rep. Garrett says haphazard implementation of rules is hurting economy.

Regulators paying attention to difference between futures, securities, Gensler says.

'Temporary relief' from July 16 deadline gives agency more time for rulemaking.

Move would give agency more time to write regulations.

Postponing rules due to take effect in July gives agency more time to complete work.

Re-proposing derivatives regs would give market more time to review them.

CFTC chairman cites Dodd-Frank derivatives rules' role in curbing speculation.