When registering a domain name under the .PS ccTLD please note that:
1-The name should not interfere with the rights of a third party.
2-The name being registered should not be used for any unlawful purpose or activities not permitted by the Palestinian law.
3-The name can't be any of the excluded or protected ones as defined by PNINA. A broad categorization of these names is Palestinian geographic names, offensive and obscene names, religious names, famous names and natural (common) names.
To read the full .PS registration policy, which you have to agree to its terms and conditions when registering domain names under the .ps, http://www.pnina.ps/registration/policy.html