Many times these types of forms are drawn up by lawyers. These forms can be very expensive and are not essential. It is only advisable for those who do not have time or resources to create this document on their own. A commercial lease agreement is different from a residential one. That is, renters have far more latitude such as constructing a building that suits their business but they have far less freedom in terms of what they can do with the property they are renting.
If the tenancy agreement is set but one or both of the parties do not agree on certain provisions in the tenancy agreement, revisions are possible. In this scenario, both parties should be extremely careful that proper wording is included especially if both parties have no education on law whatsoever. Putting down simple thoughts and compromised policies may not transcribe to proper legal wording. There are however, straightforward alterations that both parties can change themselves. One example is the housing of pets in the property. Legally, it is advised that any alterations done in the agreement should be signed or initialed by both parties as proof that they both agree to the alterations before the actual policy takes place.