Managing localhost

[techlists at phpcoderusa.com]

Hi,

This book  :  
https://www.oreilly.com/library/view/dns-and-bind/0596100574/ch04.html  
says I should manage the localhost within my zone (SOA) and reverse 
lookup / PTR.

I do not manage my revers lookup / PTR the IP owner does that.

Any thoughts on managing the localhost within the zone file and PTR?

Thanks!!