Need enhancement for KS01 Transaction for Department Filed

Question

Hi Gurus,
Iam having a requirement on KS01 transaction to find enhancement for Department field.
Here I could not find any enhancement Exit to proceed further.
Please let know is there any alternate solution:
Here is my comlete rquirement below:
1.Make the u2018Departmentu2019 field, (CSKSZ-ABTEI), mandatory in the Cost Centre Master Record using   screen program name SAPLKMA1 and screen number 0300.
2.Check the entry made in the u2018Departmentu2019 field, (CSKSZ-ABTEI), in the Cost Centre master record
When the transaction KS01 is saved check the value in the u2018Departmentu2019 field, (CSKSZ-ABTEI), against values stored in a variable in a Z table by Controlling Area, if matched allow creation, if no match go to the first message below.
3.Department field is not allowed to be changed once postings have been made to the Cost Centre.
Check for transaction KS02 or KS12 when save check if u2018Departmentu2019 field has been changed, if no change continue, if changed check to see if postings have been made to the Cost Centre (table COEP), if postings have been made give the second error below, if no postings allow changes to be saved.
Thanks & Regards
Bhaskar

Answer 1

Hi,
    Check following User Exits in SMOD all are for KS01.
  Exit Name           Description
COCCA001            Customer enhancement to cost center authorization checks
COCCA002            Customer Functions for Organizational Authorization Checks
COOMEP01            CO-OM: Information system -> line item reports
COOMKA01            Customer Fields for Cost Element Master Data
COOMKS01            Customer Fields for Cost Center Master Data
COOMKS02            Cost Center: Checks When Saving
COOMKS03            Cost Center: BAPI Enhancements
COOMLA01            Customer Fields for Activity Type Master Data
Salil....