Why we credit Profit and Loss account under IAS 40

[farrukh090]

Can anyone answer?

Under IAS 40 (Investment Properties), Why do we credit P&L Account when property is revalued?

A/C entry

Dr Investment Properties
Cr P&L

and Under IAS 16 Property Plant & Equipment we only credited Revaluation Reserve when Property revalued.

A/C Entry,

Dr Property Plant and equipment
Cr Revaluation Reserve

Kindly explain this difference I am really confused about both concept...