What is the meaning of Such condition must not be invalid? Section 32 of Transfer of Property Act, 1882
32. In order that a condition that in interest shall cease to exist may be valid, it is necessary that the event to which it relates be one which could legally constitute the condition of the creation of an interest.
Section 21 - Contingent interest
Section 22 - Transfer to members of a class who attain a particular age
Section 23 - Transfer contingent on happening of specified uncertain event
Section 24 - Transfer to such of certain persons as survive at some period not specified
Section 25 - Conditional transfer
Section 26 - Fulfillment of condition precedent
Section 28 - Ulterior transfer conditional on happening or not happening of specified event
Section 29 - Fulfillment of condition subsequent
Section 30 - Prior disposition not affected by invalidity of ulterior disposition
Section 32 - Such condition must not be invalid
Section 33 - Transfer conditional on performance of act, no time being specified for performance
Section 34 - Transfer conditional on performance of act, time being specified
Section 35 - Election when necessary
Section 36 - Apportionment of periodical payments on determination of interest of person entitled
Section 37 - Apportionment of benefit of obligation on severance
Section 38 - Transfer by person authorised only under certain circumstances to transfer
Section 39 - Transfer where third person is entitled to maintenance
Section 40 - Burden of obligation imposing restriction on use of land