Почему происходит ошибка при обращении к полю статического класса?

#pragma once
#include "Fraction.h"
#include "vector"
using namespace std;
static class LogVoting
{
public:
 
    static  vector RegisteredDeputy;
    static      vector RegisteredFraction;
};

DEPUTY

#pragma once
#include "GovernmentEmployee.h"
#include "Human.h"

class Deputy : public GovernmentEmployee, public Human
{
public:
    Deputy(){ NumberOfPlaces = 0; };
    Deputy(unsigned number );
    Deputy(unsigned number, bool immunity, int age, string name, string surname, PeopleGender gender);
    virtual ~Deputy();

    unsigned get_Number();
    bool set_Number(int number);

protected:
    unsigned NumberOfPlaces;

};

#pragma once
#include "Deputy.h"
#include "vector"

class Fraction
{
public:
    Fraction();
    Fraction(string name, Deputy *leader,unsigned maxCountMembers);
    ~Fraction();

    bool set_Name(string name);
    string get_Name();
    unsigned get_MaxCountMembers();

    Deputy* get_Leader();
    bool set_Leader(Deputy *deputy);

    bool AddToDeputsList(Deputy* deputy);
    void DeleteDeputsFromList(Deputy * deputy);
protected:
    unsigned MaxCountMembers;
    string Name;
    vector DeputyList;
    Deputy  *Leader;
};