Following information must be provided for any LK Domain Registration.

If domain is registered for Company/Organization

Domain Name
 
Reason for Select above domain
Organization Details
Organzaiton Name
Nature of the Organization
Registration Number
Organization Address
Contact Number of the Organization
Domain Owner ( registrant/administrative contact person)
Name
NIC or Passport Number
Postal Address
Contact Number
Email Address
( note, this will be email address liked to the domain)

If the domain is going to register for individual ( for personal purpose) you only need to provide following details.

Domain Name 
Reason for Select above domain
Domain Owner ( registrant/administrative contact person)
Name
NIC or Passport Number
Postal Address
Contact Number
Email Address
( note, this will be email address liked to the domain)

Also if you would like to have technical person ( who can change the domain name servers directly on NIC.LK/LANKAHOST and act as technical admin for the domain) you would requires to submit following details with above information.

Technical Contact Person of the Domain
Name
NIC or Passport Number
Postal Address
Contact Number
Email Address