Are people with autism considered mukallaf, and may they marry?

Summary

The Penang State Fatwa Committee divides people with autism into two categories. The mukallaf category covers individuals who live like ordinary people and must fulfil all religious obligations, and they may marry and carry out spousal duties. Their obligation is lifted when a marked change is confirmed by a medical specialist and both of these conditions exist: they cannot understand religious directives, and they cannot perform religious practices because of an intellectual disturbance that occurs at certain times and is not permanent. The non-mukallaf category covers those with low IQ who permanently cannot control their emotions and act uncontrollably, so obligation is lifted; they may marry through a contract by a guardian, who bears the responsibility for material maintenance.

Written in our own words from the original fatwa — check the source before acting on it.