Save validation rules on database

I'm not sure what is my question but I will try to explain.

Considering that every type in a domain model will become a rule or validation (or whatever) Strategy, what is the problem of persisting these validators on Database?

For example:

There is the followning model

public Class Contrat
{
    ...
    public ContratType Type {get;set;}

    public bool Validate(){
        return Type.Validate(this);
    }
}

public abstract class ContractType
{
    public int Id{ get; set; }
    public string Description{ get; set; }

    public abstract bool Validate(Contract contract);
}

public Class PreSale : ContractType
{
    public override bool Validate(Contract contract)
    {
        //here goes specific validation for PreSale
    }
}

public Class HighRiskSale : ContractType
{
    public override bool Validate(Contract contract)
    {
        //here goes specific validation for HighRiskSale
    }
}

public Class AprovedSale : ContractType
{
    public override bool Validate(Contract contract)
    {
        //here goes specific validation for AprovedSale
    }
}

I will use a Table Per Hierarchy approach to manage the concrete validators

Is it a damnable approach?

What are the problems of doing it?

Thanks in advance