As far as I can work out from Part 61, ATPL(A) needs:
>21 years old
CPL or Multi-Crew licence (A)
Theory pass
Flight training for ATPL
Pass the flight test IFR turbine with co-pilot, or in an approved sim
Multi-crew co-op course pass
Experience:
>1500 hrs aeronautical experience
>1400 as a pilot
>750 as pilot (A)
either >500 PICUS(A)
or >250 PIC or PICUS (70 must be PIC)
and >200 cross country(A)
and >100 cross country PIC or PICUS (PICUS being the new ICUS
)
and >100 night that's not dual
and >75 IF
and >45 IF(A)
How is this impossible? Costly, yes, but ...