Yes and they are:

The nameservers of the domain name must be located in Algeria

The domain name must be realted to a trademark or company name

No

Trustee service is not available for this extension

No, .com.dz does not provide ID protection to the registrant of the domain

Yes. There are some domain names restricted for the registration of .COM.DZ domain extension.

Generic names, offensive, misleading, and names contrary to Algerian law is prohibited.

Anyone can register it both individual and organization

The minimum period to register this domain name is 1 year

It takes 30day/s

.COM.DZ Domain Names must:

1. Have minimum of 2 and a maximum of 24 characters;
2. Begin with a letter or a number and end with a letter or a number;
3. Use the English character set and may contain letters (i.e., a-z, A-Z),numbers (i.e. 0-9) and dashes (-) or a combination of these;
4. Neither begin with, nor  end with a dash;
5. Not contain a dash in the third and fourth positions (e.g. www.ab- -cd.com.dz); and
6. Not include a space (e.g. www.ab cd.com.dz).

Network Information Center.DZ manages this domain name extension

Once the domain expires, it will be in Renewal Grace Period for 0-60 days when the domain name can only be renewed but not transferred to another registrar. At the end of the Grace Period, it enters into a 5-day Pending Purge period and the domain name can no longer be renewed or recovered. After this period, the domain will be available to the general public for re-registration on “First come First serve basis”.

The maximum period for this domain registration is 5 Years.